6511656615066 has 24 divisors (see below), whose sum is σ = 14851146666720. Its totient is φ = 2056312615176.

The previous prime is 6511656615041. The next prime is 6511656615151. The reversal of 6511656615066 is 6605166561156.

6511656615066 is a `hidden beast` number, since 6 + 5 + 1 + 1 + 6 + 566 + 15 + 0 + 66 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9519965470 + ... + 9519966153.

It is an arithmetic number, because the mean of its divisors is an integer number (618797777780).

Almost surely, 2^{6511656615066} is an apocalyptic number.

6511656615066 is an abundant number, since it is smaller than the sum of its proper divisors (8339490051654).

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

6511656615066 is a wasteful number, since it uses less digits than its factorization.

6511656615066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19039931650 (or 19039931647 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 6511656615066 in words is "six trillion, five hundred eleven billion, six hundred fifty-six million, six hundred fifteen thousand, sixty-six".