166515272 has 64 divisors (see below), whose sum is σ = 412179840. Its totient is φ = 61056000.

The previous prime is 166515269. The next prime is 166515311. The reversal of 166515272 is 272515661.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2522 + ... + 18422.

It is an arithmetic number, because the mean of its divisors is an integer number (6440310).

Almost surely, 2^166515272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166515272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206089920).

166515272 is an abundant number, since it is smaller than the sum of its proper divisors (245664568).

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

166515272 is a wasteful number, since it uses less digits than its factorization.

166515272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942 (or 15938 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 166515272 is about 12904.0796649742. The cubic root of 166515272 is about 550.1545262777.

The spelling of 166515272 in words is "one hundred sixty-six million, five hundred fifteen thousand, two hundred seventy-two".