566839878161 has 2 divisors, whose sum is σ = 566839878162. Its totient is φ = 566839878160.

The previous prime is 566839878109. The next prime is 566839878193. The reversal of 566839878161 is 161878938665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483004150225 + 83835727936 = 694985^2 + 289544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566839878161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 566839878091 and 566839878100.

It is not a weakly prime, because it can be changed into another prime (566839838161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283419939080 + 283419939081.

It is an arithmetic number, because the mean of its divisors is an integer number (283419939081).

Almost surely, 2^566839878161 is an apocalyptic number.

It is an amenable number.

566839878161 is a deficient number, since it is larger than the sum of its proper divisors (1).

566839878161 is an equidigital number, since it uses as much as digits as its factorization.

566839878161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 68.

The spelling of 566839878161 in words is "five hundred sixty-six billion, eight hundred thirty-nine million, eight hundred seventy-eight thousand, one hundred sixty-one".