566281877981 has 2 divisors, whose sum is σ = 566281877982. Its totient is φ = 566281877980.

The previous prime is 566281877971. The next prime is 566281877999. The reversal of 566281877981 is 189778182665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323636969881 + 242644908100 = 568891^2 + 492590^2 .

It is a cyclic number.

It is not a de Polignac number, because 566281877981 - 2³⁴ = 549102008797 is a prime.

It is a super-2 number, since 2×566281877981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566281877971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283140938990 + 283140938991.

It is an arithmetic number, because the mean of its divisors is an integer number (283140938991).

Almost surely, 2^566281877981 is an apocalyptic number.

It is an amenable number.

566281877981 is a deficient number, since it is larger than the sum of its proper divisors (1).

566281877981 is an equidigital number, since it uses as much as digits as its factorization.

566281877981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 68.

The spelling of 566281877981 in words is "five hundred sixty-six billion, two hundred eighty-one million, eight hundred seventy-seven thousand, nine hundred eighty-one".