665204920 has 16 divisors (see below), whose sum is σ = 1496711160. Its totient is φ = 266081952.

The previous prime is 665204909. The next prime is 665204941. The reversal of 665204920 is 29402566.

665204920 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8315022 + ... + 8315101.

Almost surely, 2^665204920 is an apocalyptic number.

It is an amenable number.

665204920 is an abundant number, since it is smaller than the sum of its proper divisors (831506240).

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

665204920 is a wasteful number, since it uses less digits than its factorization.

665204920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16630134 (or 16630130 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 665204920 is about 25791.5668387944. The cubic root of 665204920 is about 872.9415208553.

The spelling of 665204920 in words is "six hundred sixty-five million, two hundred four thousand, nine hundred twenty".