566495561 has 2 divisors, whose sum is σ = 566495562. Its totient is φ = 566495560.

The previous prime is 566495551. The next prime is 566495663. The reversal of 566495561 is 165594665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483120400 + 83375161 = 21980^2 + 9131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566495561 is a prime.

It is not a weakly prime, because it can be changed into another prime (566495551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283247780 + 283247781.

It is an arithmetic number, because the mean of its divisors is an integer number (283247781).

Almost surely, 2^566495561 is an apocalyptic number.

It is an amenable number.

566495561 is a deficient number, since it is larger than the sum of its proper divisors (1).

566495561 is an equidigital number, since it uses as much as digits as its factorization.

566495561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 47.

The square root of 566495561 is about 23801.1672192773. The cubic root of 566495561 is about 827.4317287743.

The spelling of 566495561 in words is "five hundred sixty-six million, four hundred ninety-five thousand, five hundred sixty-one".