166875720 has 64 divisors (see below), whose sum is σ = 546143040. Its totient is φ = 40454400.

The previous prime is 166875719. The next prime is 166875739. The reversal of 166875720 is 27578661.

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, 61891 + ... + 64530.

It is an arithmetic number, because the mean of its divisors is an integer number (8533485).

Almost surely, 2^166875720 is an apocalyptic number.

166875720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166875720 is an abundant number, since it is smaller than the sum of its proper divisors (379267320).

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

166875720 is a wasteful number, since it uses less digits than its factorization.

166875720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126446 (or 126442 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 166875720 is about 12918.0385508017. The cubic root of 166875720 is about 550.5512049786.

The spelling of 166875720 in words is "one hundred sixty-six million, eight hundred seventy-five thousand, seven hundred twenty".