22566644 has 6 divisors (see below), whose sum is σ = 39491634. Its totient is φ = 11283320.

The previous prime is 22566641. The next prime is 22566647. The reversal of 22566644 is 44666522.

22566644 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (22566641) and next prime (22566647).

It can be written as a sum of positive squares in only one way, i.e., 11424400 + 11142244 = 3380^2 + 3338^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22566641) by changing a digit.

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 as a sum of consecutive naturals, namely, 2820827 + ... + 2820834.

It is an arithmetic number, because the mean of its divisors is an integer number (6581939).

Almost surely, 2^22566644 is an apocalyptic number.

It is an amenable number.

22566644 is a deficient number, since it is larger than the sum of its proper divisors (16924990).

22566644 is a wasteful number, since it uses less digits than its factorization.

22566644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641665 (or 5641663 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 22566644 is about 4750.4361904987. The cubic root of 22566644 is about 282.5892646097.

The spelling of 22566644 in words is "twenty-two million, five hundred sixty-six thousand, six hundred forty-four".