220566688 has 24 divisors (see below), whose sum is σ = 453122208. Its totient is φ = 105488064.

The previous prime is 220566677. The next prime is 220566691. The reversal of 220566688 is 886665022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149106 + ... + 150577.

It is an arithmetic number, because the mean of its divisors is an integer number (18880092).

Almost surely, 2^220566688 is an apocalyptic number.

It is an amenable number.

220566688 is an abundant number, since it is smaller than the sum of its proper divisors (232555520).

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

220566688 is a wasteful number, since it uses less digits than its factorization.

220566688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299716 (or 299708 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 220566688 is about 14851.4877369239. The cubic root of 220566688 is about 604.1989608125.

The spelling of 220566688 in words is "two hundred twenty million, five hundred sixty-six thousand, six hundred eighty-eight".