8

Properties

8 is the 2nd cube number.

8 is equal to 4!!, the double factorial of 4.

8 is a power of two.

8 is the only number whose square is two digits, both of which are even.

In googology

Some googologisms based on 8 are superoct and octoogol.

In Greek- and Latin-based number naming systems, 8 is associated with prefix octi-.

8 is equal to \(f_2(2)\) or \(f_\omega(2)\) in the fast-growing hierarchy.

Aarex Tiaokhiao coined the name octal-uoonol for this number.^[1]

Username5243 coined the names Binary-Gootol and Octal-Goonol for this number, and it's equal to 2[1]3 = 8[1]1 in Username5243's Array Notation.^[2]

Sources

1. ↑ Part 1 (LAN) - Aarex Googology
2. ↑ Part 1 - My Large Numbers