667688333247 has 48 divisors (see below), whose sum is σ = 1042950111840. Its totient is φ = 409176002304.

The previous prime is 667688333189. The next prime is 667688333281. The reversal of 667688333247 is 742333886766.

It is not a de Polignac number, because 667688333247 - 2¹¹ = 667688331199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667688333947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117485868 + ... + 117491550.

It is an arithmetic number, because the mean of its divisors is an integer number (21728127330).

Almost surely, 2^667688333247 is an apocalyptic number.

667688333247 is a deficient number, since it is larger than the sum of its proper divisors (375261778593).

667688333247 is a wasteful number, since it uses less digits than its factorization.

667688333247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704 (or 9701 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 63.

The spelling of 667688333247 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, three hundred thirty-three thousand, two hundred forty-seven".