6565798688 has 72 divisors (see below), whose sum is σ = 13684014288. Its totient is φ = 3100675968.

The previous prime is 6565798649. The next prime is 6565798697. The reversal of 6565798688 is 8868975656.

It is a super-2 number, since 2×6565798688² = 86219424822685042688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5116895 + ... + 5118177.

It is an arithmetic number, because the mean of its divisors is an integer number (190055754).

Almost surely, 2^6565798688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6565798688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6842007144).

6565798688 is an abundant number, since it is smaller than the sum of its proper divisors (7118215600).

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

6565798688 is a wasteful number, since it uses less digits than its factorization.

6565798688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1747 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 68.

The square root of 6565798688 is about 81029.6161165780. The cubic root of 6565798688 is about 1872.5317389063.

The spelling of 6565798688 in words is "six billion, five hundred sixty-five million, seven hundred ninety-eight thousand, six hundred eighty-eight".