22661665 has 16 divisors (see below), whose sum is σ = 29389248. Its totient is φ = 16675776.

The previous prime is 22661657. The next prime is 22661671. The reversal of 22661665 is 56616622.

It is not a de Polignac number, because 22661665 - 2³ = 22661657 is a prime.

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 22661665.

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 15 ways as a sum of consecutive naturals, for example, 28402 + ... + 29188.

It is an arithmetic number, because the mean of its divisors is an integer number (1836828).

Almost surely, 2^22661665 is an apocalyptic number.

It is an amenable number.

22661665 is a deficient number, since it is larger than the sum of its proper divisors (6727583).

22661665 is a wasteful number, since it uses less digits than its factorization.

22661665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its digits is 25920, while the sum is 34.

The square root of 22661665 is about 4760.4269766482. The cubic root of 22661665 is about 282.9853405484.

The spelling of 22661665 in words is "twenty-two million, six hundred sixty-one thousand, six hundred sixty-five".