6617116661 has 8 divisors (see below), whose sum is σ = 6642447360. Its totient is φ = 6591828672.

The previous prime is 6617116637. The next prime is 6617116679. The reversal of 6617116661 is 1666117166.

6617116661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6617116661 - 2²² = 6612922357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617116691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318941 + ... + 339053.

It is an arithmetic number, because the mean of its divisors is an integer number (830305920).

Almost surely, 2^6617116661 is an apocalyptic number.

It is an amenable number.

6617116661 is a deficient number, since it is larger than the sum of its proper divisors (25330699).

6617116661 is a wasteful number, since it uses less digits than its factorization.

6617116661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21355.

The product of its digits is 54432, while the sum is 41.

The square root of 6617116661 is about 81345.6615991289. The cubic root of 6617116661 is about 1877.3976235945.

The spelling of 6617116661 in words is "six billion, six hundred seventeen million, one hundred sixteen thousand, six hundred sixty-one".