6566319418956 has 72 divisors (see below), whose sum is σ = 17831531556720. Its totient is φ = 1872747064320.

The previous prime is 6566319418909. The next prime is 6566319418957. The reversal of 6566319418956 is 6598149136656.

It is a super-2 number, since 2×6566319418956² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6566319418957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132982921 + ... + 133032288.

It is an arithmetic number, because the mean of its divisors is an integer number (247660160510).

Almost surely, 2^{6566319418956} is an apocalyptic number.

6566319418956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6566319418956 is an abundant number, since it is smaller than the sum of its proper divisors (11265212137764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6566319418956 is a wasteful number, since it uses less digits than its factorization.

6566319418956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266015255 (or 266015242 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 69.

The spelling of 6566319418956 in words is "six trillion, five hundred sixty-six billion, three hundred nineteen million, four hundred eighteen thousand, nine hundred fifty-six".