666560072252 has 24 divisors (see below), whose sum is σ = 1183420736400. Its totient is φ = 328459499136.

The previous prime is 666560072249. The next prime is 666560072281. The reversal of 666560072252 is 252270065666.

It is a junction number, because it is equal to n+sod(n) for n = 666560072197 and 666560072206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318627 + ... + 2590202.

It is an arithmetic number, because the mean of its divisors is an integer number (49309197350).

Almost surely, 2^666560072252 is an apocalyptic number.

It is an amenable number.

666560072252 is a deficient number, since it is larger than the sum of its proper divisors (516860664148).

666560072252 is a wasteful number, since it uses less digits than its factorization.

666560072252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4909325 (or 4909323 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 666560072252 in words is "six hundred sixty-six billion, five hundred sixty million, seventy-two thousand, two hundred fifty-two".