666328612267967 has 16 divisors (see below), whose sum is σ = 731627070384672. Its totient is φ = 601818325230720.

The previous prime is 666328612267831. The next prime is 666328612268003. The reversal of 666328612267967 is 769762216823666.

It is a cyclic number.

It is not a de Polignac number, because 666328612267967 - 2³² = 666324317300671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666328612267567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11003648 + ... + 38127909.

It is an arithmetic number, because the mean of its divisors is an integer number (45726691899042).

Almost surely, 2^{666328612267967} is an apocalyptic number.

666328612267967 is a deficient number, since it is larger than the sum of its proper divisors (65298458116705).

666328612267967 is a wasteful number, since it uses less digits than its factorization.

666328612267967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49139578.

The product of its digits is 3950456832, while the sum is 77.

The spelling of 666328612267967 in words is "six hundred sixty-six trillion, three hundred twenty-eight billion, six hundred twelve million, two hundred sixty-seven thousand, nine hundred sixty-seven".