6717643655 has 8 divisors (see below), whose sum is σ = 8069136192. Its totient is φ = 5368805728.

The previous prime is 6717643643. The next prime is 6717643661. The reversal of 6717643655 is 5563467176.

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 6717643655 - 2²⁶ = 6650534791 is a prime.

It is a Duffinian number.

It is a congruent 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, 658079 + ... + 668208.

It is an arithmetic number, because the mean of its divisors is an integer number (1008642024).

Almost surely, 2^6717643655 is an apocalyptic number.

6717643655 is a deficient number, since it is larger than the sum of its proper divisors (1351492537).

6717643655 is a wasteful number, since it uses less digits than its factorization.

6717643655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327305.

The product of its digits is 3175200, while the sum is 50.

The square root of 6717643655 is about 81961.2326347036. The cubic root of 6717643655 is about 1886.8570005751.

The spelling of 6717643655 in words is "six billion, seven hundred seventeen million, six hundred forty-three thousand, six hundred fifty-five".