666046577665572 has 96 divisors (see below), whose sum is σ = 1657721267685504. Its totient is φ = 207412972800000.

The previous prime is 666046577665559. The next prime is 666046577665643. The reversal of 666046577665572 is 275566775640666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7194679 + ... + 37200222.

It is an arithmetic number, because the mean of its divisors is an integer number (17267929871724).

Almost surely, 2^{666046577665572} is an apocalyptic number.

It is an amenable number.

666046577665572 is an abundant number, since it is smaller than the sum of its proper divisors (991674690019932).

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

666046577665572 is a wasteful number, since it uses less digits than its factorization.

666046577665572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44395469 (or 44395467 counting only the distinct ones).

The product of its (nonzero) digits is 16003008000, while the sum is 78.

The spelling of 666046577665572 in words is "six hundred sixty-six trillion, forty-six billion, five hundred seventy-seven million, six hundred sixty-five thousand, five hundred seventy-two".