6516655511 has 16 divisors (see below), whose sum is σ = 7117814400. Its totient is φ = 5942613600.

The previous prime is 6516655423. The next prime is 6516655529. The reversal of 6516655511 is 1155566156.

It is a cyclic number.

It is not a de Polignac number, because 6516655511 - 2²⁶ = 6449546647 is a prime.

It is a super-2 number, since 2×6516655511² = 84933598098093342242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516655531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164516 + ... + 200246.

It is an arithmetic number, because the mean of its divisors is an integer number (444863400).

Almost surely, 2^6516655511 is an apocalyptic number.

6516655511 is a deficient number, since it is larger than the sum of its proper divisors (601158889).

6516655511 is a wasteful number, since it uses less digits than its factorization.

6516655511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36110.

The product of its digits is 135000, while the sum is 41.

The square root of 6516655511 is about 80725.8044927395. The cubic root of 6516655511 is about 1867.8482414232.

The spelling of 6516655511 in words is "six billion, five hundred sixteen million, six hundred fifty-five thousand, five hundred eleven".