6662685717 has 12 divisors (see below), whose sum is σ = 9644944140. Its totient is φ = 4432068288.

The previous prime is 6662685683. The next prime is 6662685727. The reversal of 6662685717 is 7175862666.

It can be written as a sum of positive squares in 2 ways, for example, as 2468698596 + 4193987121 = 49686^2 + 64761^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6662685717 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662685727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805842 + ... + 814067.

It is an arithmetic number, because the mean of its divisors is an integer number (803745345).

Almost surely, 2^6662685717 is an apocalyptic number.

It is an amenable number.

6662685717 is a deficient number, since it is larger than the sum of its proper divisors (2982258423).

6662685717 is a wasteful number, since it uses less digits than its factorization.

6662685717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620372 (or 1620369 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 6662685717 is about 81625.2762139278. The cubic root of 6662685717 is about 1881.6973614633.

The spelling of 6662685717 in words is "six billion, six hundred sixty-two million, six hundred eighty-five thousand, seven hundred seventeen".