166044564 has 36 divisors (see below), whose sum is σ = 479685024. Its totient is φ = 47441232.

The previous prime is 166044539. The next prime is 166044569. The reversal of 166044564 is 465440661.

166044564 is a `hidden beast` number, since 1 + 6 + 604 + 45 + 6 + 4 = 666.

166044564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166044569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329202 + ... + 329705.

It is an arithmetic number, because the mean of its divisors is an integer number (13324584).

Almost surely, 2^166044564 is an apocalyptic number.

166044564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166044564 is an abundant number, since it is smaller than the sum of its proper divisors (313640460).

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

166044564 is a wasteful number, since it uses less digits than its factorization.

166044564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658924 (or 658919 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 166044564 is about 12885.8280292731. The cubic root of 166044564 is about 549.6356418728.

The spelling of 166044564 in words is "one hundred sixty-six million, forty-four thousand, five hundred sixty-four".