220577665 has 24 divisors (see below), whose sum is σ = 335904192. Its totient is φ = 137501280.

The previous prime is 220577657. The next prime is 220577677. The reversal of 220577665 is 566775022.

It is not a de Polignac number, because 220577665 - 2³ = 220577657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38229 + ... + 43618.

It is an arithmetic number, because the mean of its divisors is an integer number (13996008).

Almost surely, 2^220577665 is an apocalyptic number.

It is an amenable number.

220577665 is a deficient number, since it is larger than the sum of its proper divisors (115326527).

220577665 is a wasteful number, since it uses less digits than its factorization.

220577665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81877 (or 81870 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 220577665 is about 14851.8572912616. The cubic root of 220577665 is about 604.2089837555.

The spelling of 220577665 in words is "two hundred twenty million, five hundred seventy-seven thousand, six hundred sixty-five".