667688534327 has 8 divisors (see below), whose sum is σ = 712993319040. Its totient is φ = 623869152480.

The previous prime is 667688534311. The next prime is 667688534341. The reversal of 667688534327 is 723435886766.

It is a happy number.

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 667688534327 - 2⁴ = 667688534311 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 (667688554327) 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, 371349788 + ... + 371351585.

It is an arithmetic number, because the mean of its divisors is an integer number (89124164880).

Almost surely, 2^667688534327 is an apocalyptic number.

667688534327 is a deficient number, since it is larger than the sum of its proper divisors (45304784713).

667688534327 is a wasteful number, since it uses less digits than its factorization.

667688534327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742701433.

The product of its digits is 243855360, while the sum is 65.

The spelling of 667688534327 in words is "six hundred sixty-seven billion, six hundred eighty-eight million, five hundred thirty-four thousand, three hundred twenty-seven".