667234716191 has 2 divisors, whose sum is σ = 667234716192. Its totient is φ = 667234716190.

The previous prime is 667234716157. The next prime is 667234716299. The reversal of 667234716191 is 191617432766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667234716191 - 2³⁴ = 650054847007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667234716101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333617358095 + 333617358096.

It is an arithmetic number, because the mean of its divisors is an integer number (333617358096).

Almost surely, 2^667234716191 is an apocalyptic number.

667234716191 is a deficient number, since it is larger than the sum of its proper divisors (1).

667234716191 is an equidigital number, since it uses as much as digits as its factorization.

667234716191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The spelling of 667234716191 in words is "six hundred sixty-seven billion, two hundred thirty-four million, seven hundred sixteen thousand, one hundred ninety-one".