166664448 has 54 divisors (see below), whose sum is σ = 480541334. Its totient is φ = 55554048.

The previous prime is 166664441. The next prime is 166664501. The reversal of 166664448 is 844466661.

It can be written as a sum of positive squares in only one way, i.e., 128323584 + 38340864 = 11328^2 + 6192^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (166664441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33865 + ... + 38472.

Almost surely, 2^166664448 is an apocalyptic number.

166664448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166664448 is an abundant number, since it is smaller than the sum of its proper divisors (313876886).

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

166664448 is an equidigital number, since it uses as much as digits as its factorization.

166664448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72359 (or 72342 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 166664448 is about 12909.8585584816. The cubic root of 166664448 is about 550.3187661796.

The spelling of 166664448 in words is "one hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-eight".