220760665 has 16 divisors (see below), whose sum is σ = 267595776. Its totient is φ = 174830400.

The previous prime is 220760663. The next prime is 220760669. The reversal of 220760665 is 566067022.

It is a happy number.

It is not a de Polignac number, because 220760665 - 2¹ = 220760663 is a prime.

It is a super-2 number, since 2×220760665² = 97470542422484450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220760665.

It is not an unprimeable number, because it can be changed into a prime (220760663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258379 + ... + 259231.

It is an arithmetic number, because the mean of its divisors is an integer number (16724736).

Almost surely, 2^220760665 is an apocalyptic number.

It is an amenable number.

220760665 is a deficient number, since it is larger than the sum of its proper divisors (46835111).

220760665 is a wasteful number, since it uses less digits than its factorization.

220760665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 220760665 is about 14858.0168595947. The cubic root of 220760665 is about 604.3760294992.

The spelling of 220760665 in words is "two hundred twenty million, seven hundred sixty thousand, six hundred sixty-five".