22665664 has 28 divisors (see below), whose sum is σ = 51403504. Its totient is φ = 9713664.

The previous prime is 22665659. The next prime is 22665667. The reversal of 22665664 is 46656622.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22665667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24849 + ... + 25744.

Almost surely, 2^22665664 is an apocalyptic number.

It is an amenable number.

22665664 is an abundant number, since it is smaller than the sum of its proper divisors (28737840).

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

22665664 is an equidigital number, since it uses as much as digits as its factorization.

22665664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50612 (or 50602 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 22665664 is about 4760.8469834684. The cubic root of 22665664 is about 283.0019852774.

The spelling of 22665664 in words is "twenty-two million, six hundred sixty-five thousand, six hundred sixty-four".