666

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 4 (3 unique) factors are:
2
3² = 9
37

Its 12 divisors are:
1
2
3
6
9
18
37
74
111
222
333
666
Its aliquote sum is:
816
makeing it a abundant number.

As Unicode codepoint (since version 1.1) this number represents this character:ʚ LATIN SMALL LETTER CLOSED OPEN E in IPA_Ext (Source: https://ucdapi.org/unicode/latest/codepoint/dec/666); HTML: ʚ

In the work of Johann Sebastian Bach BWV 666 is Jesus Christus, unser Heiland, der von uns den Gotteszorn wand (manualiter)

The number appears at position 2440 of the decimal digits of π surrounded by
7889525213852254995466672782398645659611635 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 1062.676ms; cpu: 93.6570000000003ms)