566803759681 has 2 divisors, whose sum is σ = 566803759682. Its totient is φ = 566803759680.

The previous prime is 566803759651. The next prime is 566803759759. The reversal of 566803759681 is 186957308665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556875630081 + 9928129600 = 746241^2 + 99640^2 .

It is a cyclic number.

It is not a de Polignac number, because 566803759681 - 2⁵ = 566803759649 is a prime.

It is a super-2 number, since 2×566803759681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (566803759601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283401879840 + 283401879841.

It is an arithmetic number, because the mean of its divisors is an integer number (283401879841).

Almost surely, 2^566803759681 is an apocalyptic number.

It is an amenable number.

566803759681 is a deficient number, since it is larger than the sum of its proper divisors (1).

566803759681 is an equidigital number, since it uses as much as digits as its factorization.

566803759681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65318400, while the sum is 64.

The spelling of 566803759681 in words is "five hundred sixty-six billion, eight hundred three million, seven hundred fifty-nine thousand, six hundred eighty-one".