22664779 has 2 divisors, whose sum is σ = 22664780. Its totient is φ = 22664778.

The previous prime is 22664771. The next prime is 22664783. The reversal of 22664779 is 97746622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22664779 - 2³ = 22664771 is a prime.

It is not a weakly prime, because it can be changed into another prime (22664771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332389 + 11332390.

It is an arithmetic number, because the mean of its divisors is an integer number (11332390).

Almost surely, 2^22664779 is an apocalyptic number.

22664779 is a deficient number, since it is larger than the sum of its proper divisors (1).

22664779 is an equidigital number, since it uses as much as digits as its factorization.

22664779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 22664779 is about 4760.7540369147. The cubic root of 22664779 is about 282.9983018790.

The spelling of 22664779 in words is "twenty-two million, six hundred sixty-four thousand, seven hundred seventy-nine".