166655015605500 has 96 divisors (see below), whose sum is σ = 485983892896320. Its totient is φ = 44378655494400.

The previous prime is 166655015605453. The next prime is 166655015605597. The reversal of 166655015605500 is 5506510556661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77288647 + ... + 79415646.

It is an arithmetic number, because the mean of its divisors is an integer number (5062332217670).

Almost surely, 2^{166655015605500} is an apocalyptic number.

166655015605500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166655015605500 is an abundant number, since it is smaller than the sum of its proper divisors (319328877290820).

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

166655015605500 is a wasteful number, since it uses less digits than its factorization.

166655015605500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156705024 (or 156705012 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 166655015605500 in words is "one hundred sixty-six trillion, six hundred fifty-five billion, fifteen million, six hundred five thousand, five hundred".