166465664 has 32 divisors (see below), whose sum is σ = 340603500. Its totient is φ = 80980992.

The previous prime is 166465661. The next prime is 166465679. The reversal of 166465664 is 466564661.

It can be written as a sum of positive squares in 2 ways, for example, as 143808064 + 22657600 = 11992^2 + 4760^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (166465661) 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, 12839 + ... + 22310.

Almost surely, 2^166465664 is an apocalyptic number.

It is an amenable number.

166465664 is an abundant number, since it is smaller than the sum of its proper divisors (174137836).

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

166465664 is an equidigital number, since it uses as much as digits as its factorization.

166465664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200 (or 35188 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 166465664 is about 12902.1573389879. The cubic root of 166465664 is about 550.0998870923.

The spelling of 166465664 in words is "one hundred sixty-six million, four hundred sixty-five thousand, six hundred sixty-four".