166615072 has 36 divisors (see below), whose sum is σ = 355208490. Its totient is φ = 76896768.

The previous prime is 166615069. The next prime is 166615073. The reversal of 166615072 is 270516661.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 114832656 + 51782416 = 10716^2 + 7196^2 .

It is not an unprimeable number, because it can be changed into a prime (166615073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9997 + ... + 20812.

Almost surely, 2^166615072 is an apocalyptic number.

It is an amenable number.

166615072 is an abundant number, since it is smaller than the sum of its proper divisors (188593418).

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

166615072 is a wasteful number, since it uses less digits than its factorization.

166615072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30845 (or 30824 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 166615072 is about 12907.9460798378. The cubic root of 166615072 is about 550.2644150097.

The spelling of 166615072 in words is "one hundred sixty-six million, six hundred fifteen thousand, seventy-two".