566565121 has 2 divisors, whose sum is σ = 566565122. Its totient is φ = 566565120.

The previous prime is 566565113. The next prime is 566565143. The reversal of 566565121 is 121565665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361760400 + 204804721 = 19020^2 + 14311^2 .

It is a cyclic number.

It is not a de Polignac number, because 566565121 - 2³ = 566565113 is a prime.

It is not a weakly prime, because it can be changed into another prime (566565821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283282560 + 283282561.

It is an arithmetic number, because the mean of its divisors is an integer number (283282561).

Almost surely, 2^566565121 is an apocalyptic number.

It is an amenable number.

566565121 is a deficient number, since it is larger than the sum of its proper divisors (1).

566565121 is an equidigital number, since it uses as much as digits as its factorization.

566565121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 37.

The square root of 566565121 is about 23802.6284472955. The cubic root of 566565121 is about 827.4655941738.

The spelling of 566565121 in words is "five hundred sixty-six million, five hundred sixty-five thousand, one hundred twenty-one".