6 (number)

← 5 6 7 →
-1 0 1 2 3 4 5 6 7 8 9 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	six
Ordinal	6th; (sixth)
Factorization	2 × 3
Greek numeral	Ϛ´
Roman numeral	VI
Binary	1102
Ternary	203
Quaternary	124
Quinary	115
Senary	106
Octal	68
Duodecimal	612
Hexadecimal	616
Vigesimal	620
Base 36	636

In some cultures, a sixth finger is considered very lucky. Most just think it's weird, though.

6, also written as six, was invented during the reign of Emperor Constantine when, during his battle against the Gauls, he realized that he did not have a Legion between his Fifth and Seventh Legions and needed something to fill the gap. The number has since come to refer to any of the integers between 5 and 7.

In mathematics, 6 is often used by accidentally by mathematicians with poor handwriting who cannot differentiate between 6, 0, and 9. Due to the phenomenon of reverse truncation, 2+2 approximately equals 6 for very large values of 2. A common urban legend holds that 6 is afraid of 7 because "7 8 9". Recent forensic discoveries indicate that 9 most likely died of natural causes, and 6's fear of 7 may have stemmed from other sources, such as a history of domestic violence.

If you put 6 upside down (like this: 9), you may hang your jacket on it.

6 is also 6