6516651655 has 32 divisors (see below), whose sum is σ = 8067787200. Its totient is φ = 5051289600.

The previous prime is 6516651653. The next prime is 6516651671. The reversal of 6516651655 is 5561566156.

It is not a de Polignac number, because 6516651655 - 2¹ = 6516651653 is a prime.

It is a super-2 number, since 2×6516651655² = 84933497585228478050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516651653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7014231 + ... + 7015159.

It is an arithmetic number, because the mean of its divisors is an integer number (252118350).

Almost surely, 2^6516651655 is an apocalyptic number.

6516651655 is a deficient number, since it is larger than the sum of its proper divisors (1551135545).

6516651655 is a wasteful number, since it uses less digits than its factorization.

6516651655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315.

The product of its digits is 810000, while the sum is 46.

The square root of 6516651655 is about 80725.7806094187. The cubic root of 6516651655 is about 1867.8478730121.

The spelling of 6516651655 in words is "six billion, five hundred sixteen million, six hundred fifty-one thousand, six hundred fifty-five".