166355679880 has 64 divisors (see below), whose sum is σ = 403141843440. Its totient is φ = 61416133632.

The previous prime is 166355679869. The next prime is 166355679907. The reversal of 166355679880 is 88976553661.

It can be written as a sum of positive squares in 8 ways, for example, as 90147660516 + 76208019364 = 300246^2 + 276058^2 .

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, 6058342 + ... + 6085738.

Almost surely, 2^166355679880 is an apocalyptic number.

166355679880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166355679880 is an abundant number, since it is smaller than the sum of its proper divisors (236786163560).

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

166355679880 is a wasteful number, since it uses less digits than its factorization.

166355679880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39098 (or 39094 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 166355679880 in words is "one hundred sixty-six billion, three hundred fifty-five million, six hundred seventy-nine thousand, eight hundred eighty".