566123288021 has 2 divisors, whose sum is σ = 566123288022. Its totient is φ = 566123288020.

The previous prime is 566123287987. The next prime is 566123288047. The reversal of 566123288021 is 120882321665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327285823921 + 238837464100 = 572089^2 + 488710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566123288021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566123288221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283061644010 + 283061644011.

It is an arithmetic number, because the mean of its divisors is an integer number (283061644011).

Almost surely, 2^566123288021 is an apocalyptic number.

It is an amenable number.

566123288021 is a deficient number, since it is larger than the sum of its proper divisors (1).

566123288021 is an equidigital number, since it uses as much as digits as its factorization.

566123288021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 566123288021 in words is "five hundred sixty-six billion, one hundred twenty-three million, two hundred eighty-eight thousand, twenty-one".