22166656 has 16 divisors (see below), whose sum is σ = 44160390. Its totient is φ = 11083264.

The previous prime is 22166647. The next prime is 22166659. The reversal of 22166656 is 65666122.

It can be written as a sum of positive squares in only one way, i.e., 11669056 + 10497600 = 3416^2 + 3240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (22166659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86461 + ... + 86716.

Almost surely, 2^22166656 is an apocalyptic number.

It is an amenable number.

22166656 is a deficient number, since it is larger than the sum of its proper divisors (21993734).

22166656 is an equidigital number, since it uses as much as digits as its factorization.

22166656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173191 (or 173179 counting only the distinct ones).

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

The square root of 22166656 is about 4708.1478311540. The cubic root of 22166656 is about 280.9096943469.

It can be divided in two parts, 22166 and 656, that added together give a palindrome (22822).

The spelling of 22166656 in words is "twenty-two million, one hundred sixty-six thousand, six hundred fifty-six".