664668704 has 24 divisors (see below), whose sum is σ = 1495505088. Its totient is φ = 284857920.

The previous prime is 664668691. The next prime is 664668713. The reversal of 664668704 is 407866466.

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, 1483412 + ... + 1483859.

It is an arithmetic number, because the mean of its divisors is an integer number (62312712).

Almost surely, 2^664668704 is an apocalyptic number.

It is an amenable number.

664668704 is an abundant number, since it is smaller than the sum of its proper divisors (830836384).

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

664668704 is a wasteful number, since it uses less digits than its factorization.

664668704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967288 (or 2967280 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The square root of 664668704 is about 25781.1695622988. The cubic root of 664668704 is about 872.7069009028.

The spelling of 664668704 in words is "six hundred sixty-four million, six hundred sixty-eight thousand, seven hundred four".