566091081217 has 2 divisors, whose sum is σ = 566091081218. Its totient is φ = 566091081216.

The previous prime is 566091081163. The next prime is 566091081223. The reversal of 566091081217 is 712180190665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538750128016 + 27340953201 = 733996^2 + 165351^2 .

It is a cyclic number.

It is not a de Polignac number, because 566091081217 - 2¹⁹ = 566090556929 is a prime.

It is a super-2 number, since 2×566091081217² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (566091081287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283045540608 + 283045540609.

It is an arithmetic number, because the mean of its divisors is an integer number (283045540609).

Almost surely, 2^566091081217 is an apocalyptic number.

It is an amenable number.

566091081217 is a deficient number, since it is larger than the sum of its proper divisors (1).

566091081217 is an equidigital number, since it uses as much as digits as its factorization.

566091081217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 566091081217 in words is "five hundred sixty-six billion, ninety-one million, eighty-one thousand, two hundred seventeen".