566399233991 has 2 divisors, whose sum is σ = 566399233992. Its totient is φ = 566399233990.

The previous prime is 566399233969. The next prime is 566399234087. The reversal of 566399233991 is 199332993665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 566399233991 - 2¹⁰ = 566399232967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566399233091) 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, 283199616995 + 283199616996.

It is an arithmetic number, because the mean of its divisors is an integer number (283199616996).

Almost surely, 2^566399233991 is an apocalyptic number.

566399233991 is a deficient number, since it is larger than the sum of its proper divisors (1).

566399233991 is an equidigital number, since it uses as much as digits as its factorization.

566399233991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63772920, while the sum is 65.

The spelling of 566399233991 in words is "five hundred sixty-six billion, three hundred ninety-nine million, two hundred thirty-three thousand, nine hundred ninety-one".