166521160 has 64 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 61259520.

The previous prime is 166521151. The next prime is 166521167. The reversal of 166521160 is 61125661.

166521160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166521167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223749 + ... + 224491.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^166521160 is an apocalyptic number.

166521160 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 166521160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202487040).

166521160 is an abundant number, since it is smaller than the sum of its proper divisors (238452920).

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

166521160 is a wasteful number, since it uses less digits than its factorization.

166521160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 166521160 is about 12904.3078078601. The cubic root of 166521160 is about 550.1610107113.

The spelling of 166521160 in words is "one hundred sixty-six million, five hundred twenty-one thousand, one hundred sixty".