22636661 has 2 divisors, whose sum is σ = 22636662. Its totient is φ = 22636660.

The previous prime is 22636631. The next prime is 22636681. The reversal of 22636661 is 16663622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14485636 + 8151025 = 3806^2 + 2855^2 .

It is a cyclic number.

It is not a de Polignac number, because 22636661 - 2⁶ = 22636597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22636631) 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, 11318330 + 11318331.

It is an arithmetic number, because the mean of its divisors is an integer number (11318331).

Almost surely, 2^22636661 is an apocalyptic number.

It is an amenable number.

22636661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22636661 is an equidigital number, since it uses as much as digits as its factorization.

22636661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 22636661 is about 4757.8000168145. The cubic root of 22636661 is about 282.8812239059.

The spelling of 22636661 in words is "twenty-two million, six hundred thirty-six thousand, six hundred sixty-one".