166151710565256 has 64 divisors (see below), whose sum is σ = 447333267326400. Its totient is φ = 51123404521728.

The previous prime is 166151710565209. The next prime is 166151710565261. The reversal of 166151710565256 is 652565017151661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166151710565196 and 166151710565205.

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, 93035890 + ... + 94804958.

It is an arithmetic number, because the mean of its divisors is an integer number (6989582301975).

Almost surely, 2^{166151710565256} is an apocalyptic number.

It is an amenable number.

166151710565256 is an abundant number, since it is smaller than the sum of its proper divisors (281181556761144).

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

166151710565256 is a wasteful number, since it uses less digits than its factorization.

166151710565256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070118 (or 2070114 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 57.

The spelling of 166151710565256 in words is "one hundred sixty-six trillion, one hundred fifty-one billion, seven hundred ten million, five hundred sixty-five thousand, two hundred fifty-six".