166628256515202 has 16 divisors (see below), whose sum is σ = 334113213582720. Its totient is φ = 55399968746352.

The previous prime is 166628256515197. The next prime is 166628256515233. The reversal of 166628256515202 is 202515652826661.

It is a happy 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, 35695853818 + ... + 35695858485.

It is an arithmetic number, because the mean of its divisors is an integer number (20882075848920).

Almost surely, 2^{166628256515202} is an apocalyptic number.

166628256515202 is an abundant number, since it is smaller than the sum of its proper divisors (167484957067518).

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

166628256515202 is a wasteful number, since it uses less digits than its factorization.

166628256515202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71391712697.

The product of its (nonzero) digits is 20736000, while the sum is 57.

The spelling of 166628256515202 in words is "one hundred sixty-six trillion, six hundred twenty-eight billion, two hundred fifty-six million, five hundred fifteen thousand, two hundred two".