22566656 has 72 divisors (see below), whose sum is σ = 52735200. Its totient is φ = 9633792.

The previous prime is 22566647. The next prime is 22566659. The reversal of 22566656 is 65666522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22566659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87680 + ... + 87936.

Almost surely, 2^22566656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22566656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26367600).

22566656 is an abundant number, since it is smaller than the sum of its proper divisors (30168544).

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

22566656 is an frugal number, since it uses more digits than its factorization.

22566656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 266 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 22566656 is about 4750.4374535405. The cubic root of 22566656 is about 282.5893146994.

The spelling of 22566656 in words is "twenty-two million, five hundred sixty-six thousand, six hundred fifty-six".