566857 has 2 divisors, whose sum is σ = 566858. Its totient is φ = 566856.

The previous prime is 566851. The next prime is 566879. The reversal of 566857 is 758665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546121 + 20736 = 739^2 + 144^2 .

It is a cyclic number.

It is not a de Polignac number, because 566857 - 2¹⁹ = 42569 is a prime.

It is a Chen prime.

566857 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (566851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283428 + 283429.

It is an arithmetic number, because the mean of its divisors is an integer number (283429).

2⁵⁶⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

566857 is a deficient number, since it is larger than the sum of its proper divisors (1).

566857 is an equidigital number, since it uses as much as digits as its factorization.

566857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 566857 is about 752.8990636201. The cubic root of 566857 is about 82.7607665731.

The spelling of 566857 in words is "five hundred sixty-six thousand, eight hundred fifty-seven".