666056012 has 12 divisors (see below), whose sum is σ = 1166321520. Its totient is φ = 332821296.

The previous prime is 666055997. The next prime is 666056033. The reversal of 666056012 is 210650666.

It is a super-2 number, since 2×666056012² = 887261222242688288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666056012.

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, 44312 + ... + 57407.

It is an arithmetic number, because the mean of its divisors is an integer number (97193460).

Almost surely, 2^666056012 is an apocalyptic number.

It is an amenable number.

666056012 is a deficient number, since it is larger than the sum of its proper divisors (500265508).

666056012 is a wasteful number, since it uses less digits than its factorization.

666056012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103360 (or 103358 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 666056012 is about 25808.0609887686. The cubic root of 666056012 is about 873.3136552617.

The spelling of 666056012 in words is "six hundred sixty-six million, fifty-six thousand, twelve".