665196920 has 16 divisors (see below), whose sum is σ = 1496693160. Its totient is φ = 266078752.

The previous prime is 665196913. The next prime is 665196929. The reversal of 665196920 is 29691566.

665196920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665196929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8314922 + ... + 8315001.

Almost surely, 2^665196920 is an apocalyptic number.

It is an amenable number.

665196920 is an abundant number, since it is smaller than the sum of its proper divisors (831496240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665196920 is a wasteful number, since it uses less digits than its factorization.

665196920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16629934 (or 16629930 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 665196920 is about 25791.4117488749. The cubic root of 665196920 is about 872.9380214022.

The spelling of 665196920 in words is "six hundred sixty-five million, one hundred ninety-six thousand, nine hundred twenty".