664236804 has 48 divisors (see below), whose sum is σ = 1932327936. Its totient is φ = 172528800.

The previous prime is 664236779. The next prime is 664236817. The reversal of 664236804 is 408632466.

664236804 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358512 + ... + 360359.

It is an arithmetic number, because the mean of its divisors is an integer number (40256832).

Almost surely, 2^664236804 is an apocalyptic number.

It is an amenable number.

664236804 is an abundant number, since it is smaller than the sum of its proper divisors (1268091132).

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

664236804 is a wasteful number, since it uses less digits than its factorization.

664236804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718896 (or 718894 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 664236804 is about 25772.7919325788. The cubic root of 664236804 is about 872.5178323846.

The spelling of 664236804 in words is "six hundred sixty-four million, two hundred thirty-six thousand, eight hundred four".