663

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 3 (3 unique) factors are:
3
13
17

Its 8 divisors are:
1
3
13
17
39
51
221
663
Its aliquote sum is:
345
makeing it a deficient number.

As Unicode codepoint (since version 1.1) this number represents this character:ʗ LATIN LETTER STRETCHED C in IPA_Ext (Source: https://ucdapi.org/unicode/latest/codepoint/dec/663); HTML: ʗ

In the work of Johann Sebastian Bach BWV 663 is Allein Gott in der Höh sei Ehr (in G, à 2 Clav. et Ped., Canto fermo in Tenore)

The number appears at position 1550 of the decimal digits of π surrounded by
5499119881834797753566369807426542527862551 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: 1201.495ms; cpu: 95.4319999999989ms)