565666369 has 2 divisors, whose sum is σ = 565666370. Its totient is φ = 565666368.

The previous prime is 565666337. The next prime is 565666379. The reversal of 565666369 is 963666565.

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., 552814144 + 12852225 = 23512^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 565666369 - 2⁵ = 565666337 is a prime.

It is a super-2 number, since 2×565666369² = 639956882035288322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (565666379) 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, 282833184 + 282833185.

It is an arithmetic number, because the mean of its divisors is an integer number (282833185).

Almost surely, 2^565666369 is an apocalyptic number.

It is an amenable number.

565666369 is a deficient number, since it is larger than the sum of its proper divisors (1).

565666369 is an equidigital number, since it uses as much as digits as its factorization.

565666369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 52.

The square root of 565666369 is about 23783.7416946956. The cubic root of 565666369 is about 827.0278216401.

The spelling of 565666369 in words is "five hundred sixty-five million, six hundred sixty-six thousand, three hundred sixty-nine".