166574125520 has 80 divisors (see below), whose sum is σ = 422649645120. Its totient is φ = 60549888000.

The previous prime is 166574125513. The next prime is 166574125561. The reversal of 166574125520 is 25521475661.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent 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, 2431091 + ... + 2498669.

It is an arithmetic number, because the mean of its divisors is an integer number (5283120564).

Almost surely, 2^166574125520 is an apocalyptic number.

166574125520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166574125520 is an abundant number, since it is smaller than the sum of its proper divisors (256075519600).

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

166574125520 is a wasteful number, since it uses less digits than its factorization.

166574125520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70404 (or 70398 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 166574125520 in words is "one hundred sixty-six billion, five hundred seventy-four million, one hundred twenty-five thousand, five hundred twenty".