660564012 has 24 divisors (see below), whose sum is σ = 1545289200. Its totient is φ = 219620416.

The previous prime is 660563999. The next prime is 660564017. The reversal of 660564012 is 210465066.

It is a super-2 number, since 2×660564012² = 872689627899072288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660564017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66087 + ... + 75422.

It is an arithmetic number, because the mean of its divisors is an integer number (64387050).

Almost surely, 2^660564012 is an apocalyptic number.

It is an amenable number.

660564012 is an abundant number, since it is smaller than the sum of its proper divisors (884725188).

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

660564012 is a wasteful number, since it uses less digits than its factorization.

660564012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141905 (or 141903 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 660564012 is about 25701.4398818432. The cubic root of 660564012 is about 870.9067096117.

The spelling of 660564012 in words is "six hundred sixty million, five hundred sixty-four thousand, twelve".