166564564 has 24 divisors (see below), whose sum is σ = 309263360. Its totient is φ = 78273216.

The previous prime is 166564561. The next prime is 166564571. The reversal of 166564564 is 465465661.

It is a self number, because there is not a number n which added to its sum of digits gives 166564564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166564561) 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, 1024 + ... + 18280.

Almost surely, 2^166564564 is an apocalyptic number.

It is an amenable number.

166564564 is a deficient number, since it is larger than the sum of its proper divisors (142698796).

166564564 is a wasteful number, since it uses less digits than its factorization.

166564564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17407 (or 17405 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 166564564 is about 12905.9894622613. The cubic root of 166564564 is about 550.2088066672.

The spelling of 166564564 in words is "one hundred sixty-six million, five hundred sixty-four thousand, five hundred sixty-four".