22666529 has 2 divisors, whose sum is σ = 22666530. Its totient is φ = 22666528.

The previous prime is 22666519. The next prime is 22666531. The reversal of 22666529 is 92566622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 388129 = 4720^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 22666529 - 2²⁴ = 5889313 is a prime.

Together with 22666531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22666492 and 22666501.

It is not a weakly prime, because it can be changed into another prime (22666519) 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, 11333264 + 11333265.

It is an arithmetic number, because the mean of its divisors is an integer number (11333265).

Almost surely, 2^22666529 is an apocalyptic number.

It is an amenable number.

22666529 is a deficient number, since it is larger than the sum of its proper divisors (1).

22666529 is an equidigital number, since it uses as much as digits as its factorization.

22666529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 22666529 is about 4760.9378277814. The cubic root of 22666529 is about 283.0055853426.

The spelling of 22666529 in words is "twenty-two million, six hundred sixty-six thousand, five hundred twenty-nine".