Sextets

Six Functions: XOR, OR, NOT, NOR, AND?, NAND?.

Six Warps: Up, Down, Strange, Charm, Top, Bottom.

Six Statues: Roo, Deer, Otter, Raptor, Mink, and Vole

Six genders? (Nah, life is infinitely weirder than that!) (True, but there are six on the statues, and some people are still adjusting to three. ;) )

Seven Rooms in the Paragnostic Desublimation Pool?!

Six is the number of incompleteness.

Six is the number of delicate and sensitive things.

Six faces on each leaf on the Cube Tree.

Honeycombs and benzene rings. Insect legs.

One plus two plus three.

The smallest composite number.

• Second-smallest, actually. Four is smallest. But who's counting?

"You are(,) Number Six."

...and half a dozen of the other.

The atomic number of carbon.

Geese a-laying.

Six feet under.

[Six?]

Six times a lady.

Six ways 'til Sunday.

The smallest [perfect number].

Six is a very important part of the number [sixty-ten]

The human? number.

Deep six.

The basis of Babylonian mathematical philosophy.

360 = 36*10 = (6*6)*(2*5) = (2*3)*(2*3)*2*5 = 2³*3²*5

Six degrees of separation.

Six for gold, when counting crows. Also six for hell. From which we can conclude, six for the love of money and/or for good intentions.

Six for genetics, slips, and forbidden kicks, according to [The Church].

Sixth senses.

Six months between solstices — points of greatest opposition — in a Terran standard calendar year. Six months also between equinoxes — points of greatest similarity.

Six days to create a universe, by some accounts.

On seven-segment displays, such as those of many calculators, the number six is displayed using six segments.