166564180 has 12 divisors (see below), whose sum is σ = 349784820. Its totient is φ = 66625664.

The previous prime is 166564169. The next prime is 166564187. The reversal of 166564180 is 81465661.

166564180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 103266244 + 63297936 = 10162^2 + 7956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166564187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4164085 + ... + 4164124.

It is an arithmetic number, because the mean of its divisors is an integer number (29148735).

Almost surely, 2^166564180 is an apocalyptic number.

166564180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166564180 is an abundant number, since it is smaller than the sum of its proper divisors (183220640).

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

166564180 is a wasteful number, since it uses less digits than its factorization.

166564180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328218 (or 8328216 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 166564180 is about 12905.9745854391. The cubic root of 166564180 is about 550.2083838475.

The spelling of 166564180 in words is "one hundred sixty-six million, five hundred sixty-four thousand, one hundred eighty".