664729804 has 12 divisors (see below), whose sum is σ = 1166731384. Its totient is φ = 331377984.

The previous prime is 664729787. The next prime is 664729817. The reversal of 664729804 is 408927466.

It is a happy 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, 245214 + ... + 247909.

Almost surely, 2^664729804 is an apocalyptic number.

It is an amenable number.

664729804 is a deficient number, since it is larger than the sum of its proper divisors (502001580).

664729804 is a wasteful number, since it uses less digits than its factorization.

664729804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493464 (or 493462 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 664729804 is about 25782.3545084618. The cubic root of 664729804 is about 872.7336414216.

The spelling of 664729804 in words is "six hundred sixty-four million, seven hundred twenty-nine thousand, eight hundred four".