664585904 has 20 divisors (see below), whose sum is σ = 1297038264. Its totient is φ = 329866368.

The previous prime is 664585891. The next prime is 664585907. The reversal of 664585904 is 409585466.

664585904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (664585907) 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, 149402 + ... + 153785.

Almost surely, 2^664585904 is an apocalyptic number.

It is an amenable number.

664585904 is a deficient number, since it is larger than the sum of its proper divisors (632452360).

664585904 is a wasteful number, since it uses less digits than its factorization.

664585904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303332 (or 303326 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The square root of 664585904 is about 25779.5636890930. The cubic root of 664585904 is about 872.6706607270.

The spelling of 664585904 in words is "six hundred sixty-four million, five hundred eighty-five thousand, nine hundred four".