665555388083336 has 64 divisors (see below), whose sum is σ = 1321405492579200. Its totient is φ = 313617174824448.

The previous prime is 665555388083237. The next prime is 665555388083363. The reversal of 665555388083336 is 633380883555566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13441451 + ... + 38881658.

It is an arithmetic number, because the mean of its divisors is an integer number (20646960821550).

Almost surely, 2^{665555388083336} is an apocalyptic number.

It is an amenable number.

665555388083336 is a deficient number, since it is larger than the sum of its proper divisors (655850104495864).

665555388083336 is a wasteful number, since it uses less digits than its factorization.

665555388083336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52324158 (or 52324154 counting only the distinct ones).

The product of its (nonzero) digits is 5598720000, while the sum is 74.

The spelling of 665555388083336 in words is "six hundred sixty-five trillion, five hundred fifty-five billion, three hundred eighty-eight million, eighty-three thousand, three hundred thirty-six".