664979012 has 12 divisors (see below), whose sum is σ = 1164494016. Its totient is φ = 332266440.

The previous prime is 664979011. The next prime is 664979017. The reversal of 664979012 is 210979466.

It is a super-2 number, since 2×664979012² = 884394172800992288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664979011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48968 + ... + 61055.

It is an arithmetic number, because the mean of its divisors is an integer number (97041168).

Almost surely, 2^664979012 is an apocalyptic number.

It is an amenable number.

664979012 is a deficient number, since it is larger than the sum of its proper divisors (499515004).

664979012 is a wasteful number, since it uses less digits than its factorization.

664979012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111538 (or 111536 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 664979012 is about 25787.1869733789. The cubic root of 664979012 is about 872.8426907578.

The spelling of 664979012 in words is "six hundred sixty-four million, nine hundred seventy-nine thousand, twelve".