566845666813 has 2 divisors, whose sum is σ = 566845666814. Its totient is φ = 566845666812.

The previous prime is 566845666799. The next prime is 566845666823. The reversal of 566845666813 is 318666548665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541406054809 + 25439612004 = 735803^2 + 159498^2 .

It is a cyclic number.

It is not a de Polignac number, because 566845666813 - 2⁹ = 566845666301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566845666823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283422833406 + 283422833407.

It is an arithmetic number, because the mean of its divisors is an integer number (283422833407).

Almost surely, 2^566845666813 is an apocalyptic number.

It is an amenable number.

566845666813 is a deficient number, since it is larger than the sum of its proper divisors (1).

566845666813 is an equidigital number, since it uses as much as digits as its factorization.

566845666813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 149299200, while the sum is 64.

The spelling of 566845666813 in words is "five hundred sixty-six billion, eight hundred forty-five million, six hundred sixty-six thousand, eight hundred thirteen".