664402504 has 16 divisors (see below), whose sum is σ = 1248806700. Its totient is φ = 331387392.

The previous prime is 664402489. The next prime is 664402511. The reversal of 664402504 is 405204466.

It can be written as a sum of positive squares in 2 ways, for example, as 655462404 + 8940100 = 25602^2 + 2990^2 .

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, 98257 + ... + 104800.

Almost surely, 2^664402504 is an apocalyptic number.

It is an amenable number.

664402504 is a deficient number, since it is larger than the sum of its proper divisors (584404196).

664402504 is a wasteful number, since it uses less digits than its factorization.

664402504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203472 (or 203468 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 664402504 is about 25776.0063625070. The cubic root of 664402504 is about 872.5903788939.

The spelling of 664402504 in words is "six hundred sixty-four million, four hundred two thousand, five hundred four".