668800220 has 48 divisors (see below), whose sum is σ = 1534377600. Its totient is φ = 242848320.

The previous prime is 668800207. The next prime is 668800261. The reversal of 668800220 is 22008866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187211 + ... + 190749.

It is an arithmetic number, because the mean of its divisors is an integer number (31966200).

Almost surely, 2^668800220 is an apocalyptic number.

It is an amenable number.

668800220 is an abundant number, since it is smaller than the sum of its proper divisors (865577380).

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

668800220 is a wasteful number, since it uses less digits than its factorization.

668800220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418 (or 4416 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 668800220 is about 25861.1720538726. The cubic root of 668800220 is about 874.5113876109.

The spelling of 668800220 in words is "six hundred sixty-eight million, eight hundred thousand, two hundred twenty".