22656660 has 96 divisors (see below), whose sum is σ = 70597632. Its totient is φ = 5391360.

The previous prime is 22656659. The next prime is 22656703. The reversal of 22656660 is 6665622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23712 + ... + 24648.

It is an arithmetic number, because the mean of its divisors is an integer number (735392).

Almost surely, 2^22656660 is an apocalyptic number.

22656660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22656660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35298816).

22656660 is an abundant number, since it is smaller than the sum of its proper divisors (47940972).

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

22656660 is a wasteful number, since it uses less digits than its factorization.

22656660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 22656660 is about 4759.9012594801. The cubic root of 22656660 is about 282.9645058641.

The spelling of 22656660 in words is "twenty-two million, six hundred fifty-six thousand, six hundred sixty".