667327690697 has 16 divisors (see below), whose sum is σ = 715176205632. Its totient is φ = 620435773440.

The previous prime is 667327690657. The next prime is 667327690709. The reversal of 667327690697 is 796096723766.

It is a cyclic number.

It is not a de Polignac number, because 667327690697 - 2²⁰ = 667326642121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667327690657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15741113 + ... + 15783449.

It is an arithmetic number, because the mean of its divisors is an integer number (44698512852).

Almost surely, 2^667327690697 is an apocalyptic number.

It is an amenable number.

667327690697 is a deficient number, since it is larger than the sum of its proper divisors (47848514935).

667327690697 is a wasteful number, since it uses less digits than its factorization.

667327690697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53608.

The product of its (nonzero) digits is 216040608, while the sum is 68.

The spelling of 667327690697 in words is "six hundred sixty-seven billion, three hundred twenty-seven million, six hundred ninety thousand, six hundred ninety-seven".