166944575500 has 48 divisors (see below), whose sum is σ = 377179639200. Its totient is φ = 64475140800.

The previous prime is 166944575491. The next prime is 166944575513. The reversal of 166944575500 is 5575449661.

It is a happy number.

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, 5742210 + ... + 5771209.

It is an arithmetic number, because the mean of its divisors is an integer number (7857909150).

Almost surely, 2^166944575500 is an apocalyptic number.

166944575500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166944575500 is an abundant number, since it is smaller than the sum of its proper divisors (210235063700).

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

166944575500 is a wasteful number, since it uses less digits than its factorization.

166944575500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513467 (or 11513455 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 166944575500 in words is "one hundred sixty-six billion, nine hundred forty-four million, five hundred seventy-five thousand, five hundred".