664440004 has 12 divisors (see below), whose sum is σ = 1163447824. Its totient is φ = 332026344.

The previous prime is 664439989. The next prime is 664440037. The reversal of 664440004 is 400044466.

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, 40554 + ... + 54529.

Almost surely, 2^664440004 is an apocalyptic number.

It is an amenable number.

664440004 is a deficient number, since it is larger than the sum of its proper divisors (499007820).

664440004 is a wasteful number, since it uses less digits than its factorization.

664440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96834 (or 96832 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 664440004 is about 25776.7337729201. The cubic root of 664440004 is about 872.6067954102.

The spelling of 664440004 in words is "six hundred sixty-four million, four hundred forty thousand, four".