664433704 has 32 divisors (see below), whose sum is σ = 1373097600. Its totient is φ = 298897920.

The previous prime is 664433699. The next prime is 664433711. The reversal of 664433704 is 407334466.

It is a super-2 number, since 2×664433704² = 882944294022319232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30384 + ... + 47455.

It is an arithmetic number, because the mean of its divisors is an integer number (42909300).

Almost surely, 2^664433704 is an apocalyptic number.

It is an amenable number.

664433704 is an abundant number, since it is smaller than the sum of its proper divisors (708663896).

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

664433704 is a wasteful number, since it uses less digits than its factorization.

664433704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77953 (or 77949 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 37.

The square root of 664433704 is about 25776.6115694053. The cubic root of 664433704 is about 872.6040374787.

The spelling of 664433704 in words is "six hundred sixty-four million, four hundred thirty-three thousand, seven hundred four".