Number Six
Number Six or No. 6 may refer to:

Fictional characters
Number Six (The Prisoner), the protagonist of the TV series The Prisoner
Number Six (Battlestar Galactica), a Cylon model in the reimagined TV series Battlestar Galactica
Number Six or Sayiaka Suzuki, a character from Pani Poni Dash!

Music
#6 or Shawn Crahan, American musician
No.6 Records, a British independent record label
No. 6 (album), 2011, by Patrik Isaksson
No.6 Collaborations Project, a 2019 studio album by Ed Sheeran
"Number Six" (song), a song and mini movie by Alice Nine
"Number Six", a song by Karate from the album Unsolved

Other uses
6, a number
No. 6, a Japanese novel series by Atsuko Asano
No. 6 (Violet, Green and Red), a 1951 painting by Mark Rothko
No. 6 (Yellow, White, Blue over Yellow on Gray), a 1954 painting by Mark Rothko
No 6 mine, an Israeli metal-cased anti-tank blast weapon
"Number Six", a colloquialism for the Government of Gibraltar at 6 Convent Place

See also
Numbuh 6, a baby skunk appearing in the animated TV series Codename: Kids Next Door
Six (disambiguation)
The Six (disambiguation)