22660639 has 2 divisors, whose sum is σ = 22660640. Its totient is φ = 22660638.

The previous prime is 22660637. The next prime is 22660667. The reversal of 22660639 is 93606622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22660639 - 2¹ = 22660637 is a prime.

Together with 22660637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22660633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330319 + 11330320.

It is an arithmetic number, because the mean of its divisors is an integer number (11330320).

Almost surely, 2^22660639 is an apocalyptic number.

22660639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22660639 is an equidigital number, since it uses as much as digits as its factorization.

22660639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 22660639 is about 4760.3192119857. The cubic root of 22660639 is about 282.9810697922.

The spelling of 22660639 in words is "twenty-two million, six hundred sixty thousand, six hundred thirty-nine".