664708 has 12 divisors (see below), whose sum is σ = 1269072. Its totient is φ = 302120.

The previous prime is 664693. The next prime is 664711. The reversal of 664708 is 807466.

It is a self number, because there is not a number n which added to its sum of digits gives 664708.

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, 7510 + ... + 7597.

It is an arithmetic number, because the mean of its divisors is an integer number (105756).

2⁶⁶⁴⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

664708 is a deficient number, since it is larger than the sum of its proper divisors (604364).

664708 is a wasteful number, since it uses less digits than its factorization.

664708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15122 (or 15120 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 664708 is about 815.2962651699. The cubic root of 664708 is about 87.2724099052.

It can be divided in two parts, 66 and 4708, that added together give a palindrome (4774).

The spelling of 664708 in words is "six hundred sixty-four thousand, seven hundred eight".