• The 1978 Album By Reggae Band Culture 2 Sevens Clash
• The 2004 album by Sufjan Stevens: see Seven Swans.
• The 2004 album by Gackt: see The Seventh Night: Unplugged.
• The 2004 album by The Tea Party: see Seven circles (Tea Party album.
• The 2003 album by Atmosphere: see Seven's Travels.
• The 2003 album by Enrique Iglesias: (Enrique Iglesias album).
• The 2002 EP by U2: (EP).
• The 2000 album by S Club 7: (S Club 7 album).
• The 1999 album by Avenged Sevenfold, Sounding the Seventh Trumpet
• The 1997 album by Zap Mama: (Zap Mama album).
• The 1996 album by Apoptygma Berzerk: (Apoptygma Berzerk album).
• The 1996 album The Don Killuminati: The 7-Day Theory by Tupac Shakur.
• The 1992 album by James: see Seven (James album).
• The 1986 album by George Strait: (George Strait album).
• The 1985 album by David Meece: (David Meece album).
• The 1983 album by Duran Duran.
• The 1981 album by Madness: (Madness album).
• The 1980 album by Jon Anderson: Song of Seven
• The 1974 album by Poco.
• The 1974 album by Bob Seger: see Seven (Bob Seger album).
• The 1973 album by Soft Machine: see Seven (Soft Machine album).
• The 1991 album by Mannheim Steamroller: see Fresh Aire 7
• The albums Keeper of the Seven Keys Part 1, Keeper of the Seven Keys Part 2, Keeper of the Seven Keys - The Legacy by Helloween.
• The 1988 album Seventh Son of a Seventh Son by Iron Maiden, based on the book Seventh Son by Orson Scott Card. Also Iron Maiden's seventh studio album.
• The 2000 album The Seventh Song by Steve Vai, a compilation of the seventh songs of his previous albums.
• The 1998 album by Meja: see Seven Sisters
• The 2007 album by Donut Kings.

• The number of notes in the traditional Western Major Scale
• The original diameter in inches of the 45rpm format gramaphone record.
• In music, the Roman numeral vii is the subtonic (bVII) or leading tone (VII) scale degree, chord, or diatonic function, when distinguished V = major and v = minor.
• The number of completed, numbered symphonies of Jean Sibelius and Sergei Prokofiev.
• The pop music singer in South Korea: SE7EN (singer).
• The five-piece teenybopper band from the late 1980s.
• The current band called Seven Mary Three.
• The metal band Avenged Sevenfold, also known as A7X.
• The band from the 1990s: Seven Red Seven.
• In the late 1990s a band called S Club 7 was created by Simon Fuller under 19 management.
• In 2000 a mexican pop band renamed themselves to OV7, before they were Onda Vaselina.
• The "Unsquare Dance" by Dave Brubeck is in septuple meter--seven beats to a measure.
• Seven is part or all of the name of many musical works.
• The Band "Solution 7 band," with members Steven J. Smith and Alan Vanrosendal, is an Alternative, Experimental band of McMinnville Oregon.
• There are seven musicians in a septet and seven babies born in a set of septuplets. The most famous set of septuplets are the McCaughey Septuplets, who were born in 1997.
• Product Number Seven - Rap artist based out of Michigan, known to be the "Pioneer of Boondock Wickedshit". Started in early 2001, "Product Number Seven" has played a major part in the underground music scene.
• Musician/actor Andre Benjamin's and singer Erykah Badu's son, Seven.
• The stage name of musician Keith Volpone.

• Seven is the 4th prime number.
• Seven is a Mersenne prime, since 23 - 1 = 7.
• Seven is the fourth Mersenne prime exponent.
• Seven is the first Newman-Shanks-Williams prime.
• Seven is the third Lucas prime.
• Seven is the first Woodall prime.
• Seven is the second lucky prime.
• Seven is the second safe prime.
• Seven is the fourth factorial prime
• Seven is both a Carol number and a Kynea number.
• Seven is the smallest number that can't be represented as a sum of fewer than four non-zero squares.
• Seven is the fourth self number.
• Seven is the smallest happy number, except for the trivial example of 1.
• Thelthough the divisible by seven (7) test is not well known (especially compared to the popular divisible by three (3) test), there is an easy way to test if a natural number is evenly divisible by seven (7). Divisibility rule.

1. Remove the last digit,
2. Double it, and
3. Subtract it from the remaining digits.
4. If the result is negative and there are 2 or more digits, drop the negative sign.
5. Repeat until you end up with a result that is a multiple of seven (7). (i.e. -7, 0, or +7)

For example, the number 1358 is evenly divisible by seven, since:

135 - (8*2) = 119

11 - (9*2) = -7

Using $$$$Number_Theory" title="Number Theory">Number Theory the proof is rather easy, once we rewrite the number n in the form:

n = 10a + b

Where:

a is the remaining digits, and

b is the last digit.

Then:

10a + b = 0 (mod 7)

5 * (10a + b) = 0 (mod 7)

49a + a + 5b = 0 (mod 7)

a + 5b - 7b = 0 (mod 7)

a - 2b = 0 (mod 7)

A second divisibility rule was formulated in 2006 in India, by Himanish Ganjoo, a Class 8 student in St. Columba's School Delhi:

1. Remove the last two digits
2. Divide the remaining number by 7
3. Multiply the remainder by 2
4. Thedd the product to the last two digits
5. If the sum is divisible by 7, the number is also divisible

If the sum is divisible by 7, the number is also divisible

On March 25, 2007, Ganjoo formulated another variant form of this test, now separating the last 3 digits (in step 1), and multiplying the remainder by 6 (step 3), and then adding the sum to the last 3 digits (originally separated).

For example, 1568 is divisible by 7,

1. 15/7 Remainder = 1
2. Product 1*2 = 2
3. 68 + 2 = 70 (which is divisible by 7)

Hence, 1568 is divisible by 7

• 999,999 divided by 7 is exactly 142,857. Therefore, when a vulgar fraction with 7 in the denominator is converted to a decimal expansion, the result has the same six-digit repeating sequence after the decimal point, but the sequence can start with any of those six digits. For example, 1/7 = 0.142 857 142.... and 2/7 = 0.285 714 285...
• The seven-sided polygon is a heptagon. The regular n-gons for n ≤ 6 can be constructed by compass and straightedge alone, but the regular heptagon cannot. Figurate numbers representing heptagons (including seven) are called heptagonal numbers. Seven is also a centered hexagonal number.
• There are seven frieze groups, the groups consisting of symmetries of the plane whose group of translations is isomorphic to the group of integers.
• The group or a series of seven is a heptad.
• 7 is the only dimension, besides the familiar 3, in which a vectorcross product can be defined