667688347756 has 12 divisors (see below), whose sum is σ = 1184911716240. Its totient is φ = 329142143120.

The previous prime is 667688347751. The next prime is 667688347757. The reversal of 667688347756 is 657743886766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (667688347751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175507371 + ... + 1175507938.

It is an arithmetic number, because the mean of its divisors is an integer number (98742643020).

Almost surely, 2^667688347756 is an apocalyptic number.

It is an amenable number.

667688347756 is a deficient number, since it is larger than the sum of its proper divisors (517223368484).

667688347756 is a wasteful number, since it uses less digits than its factorization.

667688347756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351015384 (or 2351015382 counting only the distinct ones).

The product of its digits is 1706987520, while the sum is 73.

The spelling of 667688347756 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, three hundred forty-seven thousand, seven hundred fifty-six".