22660399 has 2 divisors, whose sum is σ = 22660400. Its totient is φ = 22660398.

The previous prime is 22660381. The next prime is 22660403. The reversal of 22660399 is 99306622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22660399 - 2¹¹ = 22658351 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 (22660199) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330199 + 11330200.

It is an arithmetic number, because the mean of its divisors is an integer number (11330200).

Almost surely, 2^22660399 is an apocalyptic number.

22660399 is a deficient number, since it is larger than the sum of its proper divisors (1).

22660399 is an equidigital number, since it uses as much as digits as its factorization.

22660399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 22660399 is about 4760.2940035254. The cubic root of 22660399 is about 282.9800707663.

The spelling of 22660399 in words is "twenty-two million, six hundred sixty thousand, three hundred ninety-nine".