166597871532 has 96 divisors (see below), whose sum is σ = 439724839680. Its totient is φ = 48776048640.

The previous prime is 166597871501. The next prime is 166597871581. The reversal of 166597871532 is 235178795661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61069 + ... + 580452.

It is an arithmetic number, because the mean of its divisors is an integer number (4580467080).

Almost surely, 2^166597871532 is an apocalyptic number.

166597871532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166597871532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219862419840).

166597871532 is an abundant number, since it is smaller than the sum of its proper divisors (273126968148).

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

166597871532 is a wasteful number, since it uses less digits than its factorization.

166597871532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641631 (or 641629 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 60.

The spelling of 166597871532 in words is "one hundred sixty-six billion, five hundred ninety-seven million, eight hundred seventy-one thousand, five hundred thirty-two".