566217221399 has 2 divisors, whose sum is σ = 566217221400. Its totient is φ = 566217221398.

The previous prime is 566217221387. The next prime is 566217221447. The reversal of 566217221399 is 993122712665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 566217221399 - 2²⁸ = 565948785943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 566217221399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566217223399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283108610699 + 283108610700.

It is an arithmetic number, because the mean of its divisors is an integer number (283108610700).

Almost surely, 2^566217221399 is an apocalyptic number.

566217221399 is a deficient number, since it is larger than the sum of its proper divisors (1).

566217221399 is an equidigital number, since it uses as much as digits as its factorization.

566217221399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 53.

The spelling of 566217221399 in words is "five hundred sixty-six billion, two hundred seventeen million, two hundred twenty-one thousand, three hundred ninety-nine".