664652 has 12 divisors (see below), whose sum is σ = 1176840. Its totient is φ = 328416.

The previous prime is 664633. The next prime is 664661. The reversal of 664652 is 256466.

It is a super-2 number, since 2×664652² = 883524562208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578 + ... + 1289.

It is an arithmetic number, because the mean of its divisors is an integer number (98070).

2⁶⁶⁴⁶⁵² is an apocalyptic number.

It is an amenable number.

664652 is a deficient number, since it is larger than the sum of its proper divisors (512188).

664652 is a wasteful number, since it uses less digits than its factorization.

664652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960 (or 1958 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 664652 is about 815.2619211027. The cubic root of 664652 is about 87.2699590084.

The spelling of 664652 in words is "six hundred sixty-four thousand, six hundred fifty-two".