6666317931 has 16 divisors (see below), whose sum is σ = 10939599104. Its totient is φ = 3516299424.

The previous prime is 6666317927. The next prime is 6666317939. The reversal of 6666317931 is 1397136666.

It is not a de Polignac number, because 6666317931 - 2² = 6666317927 is a prime.

It is a super-2 number, since 2×6666317931² = 88879589514344241522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6666317939) 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 15 ways as a sum of consecutive naturals, for example, 12209101 + ... + 12209646.

It is an arithmetic number, because the mean of its divisors is an integer number (683724944).

Almost surely, 2^6666317931 is an apocalyptic number.

6666317931 is a deficient number, since it is larger than the sum of its proper divisors (4273281173).

6666317931 is a wasteful number, since it uses less digits than its factorization.

6666317931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24418770.

The product of its digits is 734832, while the sum is 48.

The square root of 6666317931 is about 81647.5225037478. The cubic root of 6666317931 is about 1882.0392399071.

The spelling of 6666317931 in words is "six billion, six hundred sixty-six million, three hundred seventeen thousand, nine hundred thirty-one".