166501564 has 12 divisors (see below), whose sum is σ = 291735864. Its totient is φ = 83148464.

The previous prime is 166501493. The next prime is 166501583. The reversal of 166501564 is 465105661.

It is a happy number.

It is a super-3 number, since 3×166501564³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21859 + ... + 28474.

It is an arithmetic number, because the mean of its divisors is an integer number (24311322).

Almost surely, 2^166501564 is an apocalyptic number.

It is an amenable number.

166501564 is a deficient number, since it is larger than the sum of its proper divisors (125234300).

166501564 is a wasteful number, since it uses less digits than its factorization.

166501564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51164 (or 51162 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 166501564 is about 12903.5485041906. The cubic root of 166501564 is about 550.1394291135.

The spelling of 166501564 in words is "one hundred sixty-six million, five hundred one thousand, five hundred sixty-four".