566518371491 has 2 divisors, whose sum is σ = 566518371492. Its totient is φ = 566518371490.

The previous prime is 566518371371. The next prime is 566518371527. The reversal of 566518371491 is 194173815665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566518371491 is a prime.

It is not a weakly prime, because it can be changed into another prime (566518371091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283259185745 + 283259185746.

It is an arithmetic number, because the mean of its divisors is an integer number (283259185746).

Almost surely, 2^566518371491 is an apocalyptic number.

566518371491 is a deficient number, since it is larger than the sum of its proper divisors (1).

566518371491 is an equidigital number, since it uses as much as digits as its factorization.

566518371491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 56.

The spelling of 566518371491 in words is "five hundred sixty-six billion, five hundred eighteen million, three hundred seventy-one thousand, four hundred ninety-one".