166661515116 has 48 divisors (see below), whose sum is σ = 432675090400. Its totient is φ = 55478022336.

The previous prime is 166661515099. The next prime is 166661515157. The reversal of 166661515116 is 611515166661.

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, 973471 + ... + 1131798.

Almost surely, 2^166661515116 is an apocalyptic number.

It is an amenable number.

166661515116 is an abundant number, since it is smaller than the sum of its proper divisors (266013575284).

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

166661515116 is a wasteful number, since it uses less digits than its factorization.

166661515116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106015 (or 2106007 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 166661515116 in words is "one hundred sixty-six billion, six hundred sixty-one million, five hundred fifteen thousand, one hundred sixteen".