166577768043988 has 24 divisors (see below), whose sum is σ = 339954628664000. Its totient is φ = 71390472018264.

The previous prime is 166577768043959. The next prime is 166577768044007. The reversal of 166577768043988 is 889340867775661.

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, 60706182318 + ... + 60706185061.

Almost surely, 2^{166577768043988} is an apocalyptic number.

It is an amenable number.

166577768043988 is an abundant number, since it is smaller than the sum of its proper divisors (173376860620012).

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

166577768043988 is a wasteful number, since it uses less digits than its factorization.

166577768043988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121412367404 (or 121412367388 counting only the distinct ones).

The product of its (nonzero) digits is 20483850240, while the sum is 85.

The spelling of 166577768043988 in words is "one hundred sixty-six trillion, five hundred seventy-seven billion, seven hundred sixty-eight million, forty-three thousand, nine hundred eighty-eight".