166421512160 has 96 divisors (see below), whose sum is σ = 416044242432. Its totient is φ = 62777397760.

The previous prime is 166421512141. The next prime is 166421512181. The reversal of 166421512160 is 61215124661.

It is a super-2 number, since 2×166421512160² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166421512160.

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, 57194 + ... + 579753.

It is an arithmetic number, because the mean of its divisors is an integer number (4333794192).

Almost surely, 2^166421512160 is an apocalyptic number.

166421512160 is a gapful number since it is divisible by the number (10) 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 166421512160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208022121216).

166421512160 is an abundant number, since it is smaller than the sum of its proper divisors (249622730272).

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

166421512160 is a wasteful number, since it uses less digits than its factorization.

166421512160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637056 (or 637048 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 166421512160 in words is "one hundred sixty-six billion, four hundred twenty-one million, five hundred twelve thousand, one hundred sixty".