566681 has 2 divisors, whose sum is σ = 566682. Its totient is φ = 566680.

The previous prime is 566677. The next prime is 566693. The reversal of 566681 is 186665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 225625 = 584^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 566681 - 2² = 566677 is a prime.

It is a super-2 number, since 2×566681² = 642254711522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (526681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283340 + 283341.

It is an arithmetic number, because the mean of its divisors is an integer number (283341).

2⁵⁶⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

566681 is a deficient number, since it is larger than the sum of its proper divisors (1).

566681 is an equidigital number, since it uses as much as digits as its factorization.

566681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 566681 is about 752.7821730089. The cubic root of 566681 is about 82.7522003899.

The spelling of 566681 in words is "five hundred sixty-six thousand, six hundred eighty-one".