6511056665 has 8 divisors (see below), whose sum is σ = 7813703040. Its totient is φ = 5208555312.

The previous prime is 6511056659. The next prime is 6511056757. The reversal of 6511056665 is 5666501156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6511056665 - 2¹⁶ = 6510991129 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144032 + ... + 183758.

It is an arithmetic number, because the mean of its divisors is an integer number (976712880).

Almost surely, 2^6511056665 is an apocalyptic number.

It is an amenable number.

6511056665 is a deficient number, since it is larger than the sum of its proper divisors (1302646375).

6511056665 is a wasteful number, since it uses less digits than its factorization.

6511056665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72511.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 6511056665 is about 80691.1188731449. The cubic root of 6511056665 is about 1867.3131616808.

The spelling of 6511056665 in words is "six billion, five hundred eleven million, fifty-six thousand, six hundred sixty-five".