167391666791 has 2 divisors, whose sum is σ = 167391666792. Its totient is φ = 167391666790.

The previous prime is 167391666787. The next prime is 167391666901. The reversal of 167391666791 is 197666193761.

167391666791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 167391666791 - 2² = 167391666787 is a prime.

It is a super-2 number, since 2×167391666791² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167391666191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83695833395 + 83695833396.

It is an arithmetic number, because the mean of its divisors is an integer number (83695833396).

Almost surely, 2^167391666791 is an apocalyptic number.

167391666791 is a deficient number, since it is larger than the sum of its proper divisors (1).

167391666791 is an equidigital number, since it uses as much as digits as its factorization.

167391666791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15431472, while the sum is 62.

The spelling of 167391666791 in words is "one hundred sixty-seven billion, three hundred ninety-one million, six hundred sixty-six thousand, seven hundred ninety-one".