6511661116 has 12 divisors (see below), whose sum is σ = 11443088160. Its totient is φ = 3242207360.

The previous prime is 6511661111. The next prime is 6511661129. The reversal of 6511661116 is 6111661156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511661111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3404725 + ... + 3406636.

It is an arithmetic number, because the mean of its divisors is an integer number (953590680).

Almost surely, 2^6511661116 is an apocalyptic number.

It is an amenable number.

6511661116 is a deficient number, since it is larger than the sum of its proper divisors (4931427044).

6511661116 is a wasteful number, since it uses less digits than its factorization.

6511661116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811604 (or 6811602 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 6511661116 is about 80694.8642479805. The cubic root of 6511661116 is about 1867.3709436170.

The spelling of 6511661116 in words is "six billion, five hundred eleven million, six hundred sixty-one thousand, one hundred sixteen".