6717355661 has 8 divisors (see below), whose sum is σ = 6901603320. Its totient is φ = 6533250048.

The previous prime is 6717355657. The next prime is 6717355679. The reversal of 6717355661 is 1665537176.

It can be written as a sum of positive squares in 4 ways, for example, as 4673773225 + 2043582436 = 68365^2 + 45206^2 .

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 6717355661 - 2² = 6717355657 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 (6717352661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64145 + ... + 132473.

It is an arithmetic number, because the mean of its divisors is an integer number (862700415).

Almost surely, 2^6717355661 is an apocalyptic number.

It is an amenable number.

6717355661 is a deficient number, since it is larger than the sum of its proper divisors (184247659).

6717355661 is a wasteful number, since it uses less digits than its factorization.

6717355661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71023.

The product of its digits is 793800, while the sum is 47.

The square root of 6717355661 is about 81959.4757242871. The cubic root of 6717355661 is about 1886.8300361965.

The spelling of 6717355661 in words is "six billion, seven hundred seventeen million, three hundred fifty-five thousand, six hundred sixty-one".