6561116700 has 36 divisors (see below), whose sum is σ = 18983498520. Its totient is φ = 1749631040.

The previous prime is 6561116677. The next prime is 6561116701. The reversal of 6561116700 is 76111656.

It is a super-3 number, since 3×6561116700³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561116701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10934895 + ... + 10935494.

Almost surely, 2^6561116700 is an apocalyptic number.

6561116700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6561116700 is an abundant number, since it is smaller than the sum of its proper divisors (12422381820).

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

6561116700 is a wasteful number, since it uses less digits than its factorization.

6561116700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21870406 (or 21870399 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 6561116700 is about 81000.7203671671. The cubic root of 6561116700 is about 1872.0865401680.

The spelling of 6561116700 in words is "six billion, five hundred sixty-one million, one hundred sixteen thousand, seven hundred".