668632875662167 has 4 divisors (see below), whose sum is σ = 720066173790040. Its totient is φ = 617199577534296.

The previous prime is 668632875662119. The next prime is 668632875662221. The reversal of 668632875662167 is 761266578236866.

668632875662167 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668632875662167 - 2¹⁵ = 668632875629399 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 (668632875662107) 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, 25716649063917 + ... + 25716649063942.

It is an arithmetic number, because the mean of its divisors is an integer number (180016543447510).

Almost surely, 2^{668632875662167} is an apocalyptic number.

668632875662167 is a deficient number, since it is larger than the sum of its proper divisors (51433298127873).

668632875662167 is a wasteful number, since it uses less digits than its factorization.

668632875662167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51433298127872.

The product of its digits is 8778792960, while the sum is 79.

The spelling of 668632875662167 in words is "six hundred sixty-eight trillion, six hundred thirty-two billion, eight hundred seventy-five million, six hundred sixty-two thousand, one hundred sixty-seven".