166115564 has 24 divisors (see below), whose sum is σ = 295587600. Its totient is φ = 81673920.

The previous prime is 166115557. The next prime is 166115569. The reversal of 166115564 is 465511661.

It is not an unprimeable number, because it can be changed into a prime (166115569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59234 + ... + 61974.

It is an arithmetic number, because the mean of its divisors is an integer number (12316150).

Almost surely, 2^166115564 is an apocalyptic number.

It is an amenable number.

166115564 is a deficient number, since it is larger than the sum of its proper divisors (129472036).

166115564 is a wasteful number, since it uses less digits than its factorization.

166115564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993 (or 2991 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 166115564 is about 12888.5826994282. The cubic root of 166115564 is about 549.7139713862.

The spelling of 166115564 in words is "one hundred sixty-six million, one hundred fifteen thousand, five hundred sixty-four".