665877637700522 has 16 divisors (see below), whose sum is σ = 1076360370285312. Its totient is φ = 307124746587120.

The previous prime is 665877637700491. The next prime is 665877637700581. The reversal of 665877637700522 is 225007736778566.

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, 8474705378 + ... + 8474783949.

It is an arithmetic number, because the mean of its divisors is an integer number (67272523142832).

Almost surely, 2^{665877637700522} is an apocalyptic number.

665877637700522 is a deficient number, since it is larger than the sum of its proper divisors (410482732584790).

665877637700522 is a wasteful number, since it uses less digits than its factorization.

665877637700522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949490853.

The product of its (nonzero) digits is 1244678400, while the sum is 71.

The spelling of 665877637700522 in words is "six hundred sixty-five trillion, eight hundred seventy-seven billion, six hundred thirty-seven million, seven hundred thousand, five hundred twenty-two".