5666561116531 has 12 divisors (see below), whose sum is σ = 6591753075600. Its totient is φ = 4857023557680.

The previous prime is 5666561116487. The next prime is 5666561116537. The reversal of 5666561116531 is 1356111656665.

It is not a de Polignac number, because 5666561116531 - 2¹⁵ = 5666561083763 is a prime.

It is a super-2 number, since 2×5666561116531² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5666561116537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14357370 + ... + 14746768.

It is an arithmetic number, because the mean of its divisors is an integer number (549312756300).

Almost surely, 2^{5666561116531} is an apocalyptic number.

5666561116531 is a deficient number, since it is larger than the sum of its proper divisors (925191959069).

5666561116531 is a wasteful number, since it uses less digits than its factorization.

5666561116531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686394 (or 686387 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 52.

The spelling of 5666561116531 in words is "five trillion, six hundred sixty-six billion, five hundred sixty-one million, one hundred sixteen thousand, five hundred thirty-one".