665930172016 has 10 divisors (see below), whose sum is σ = 1290239708312. Its totient is φ = 332965086000.

The previous prime is 665930172013. The next prime is 665930172059. The reversal of 665930172016 is 610271039566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665930172013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20810317860 + ... + 20810317891.

Almost surely, 2^665930172016 is an apocalyptic number.

It is an amenable number.

665930172016 is a deficient number, since it is larger than the sum of its proper divisors (624309536296).

665930172016 is a wasteful number, since it uses less digits than its factorization.

665930172016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41620635759 (or 41620635753 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 665930172016 in words is "six hundred sixty-five billion, nine hundred thirty million, one hundred seventy-two thousand, sixteen".