6511166500000 has 84 divisors (see below), whose sum is σ = 16023369937302. Its totient is φ = 2604466400000.

The previous prime is 6511166499967. The next prime is 6511166500061. The reversal of 6511166500000 is 56611156.

It can be written as a sum of positive squares in 7 ways, for example, as 1510450832016 + 5000715667984 = 1229004^2 + 2236228^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6011167 + ... + 7011166.

Almost surely, 2^{6511166500000} is an apocalyptic number.

It is an amenable number.

6511166500000 is an abundant number, since it is smaller than the sum of its proper divisors (9512203437302).

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

6511166500000 is an frugal number, since it uses more digits than its factorization.

6511166500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13022373 (or 13022340 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 6511166500000 in words is "six trillion, five hundred eleven billion, one hundred sixty-six million, five hundred thousand".