667376531264591 has 2 divisors, whose sum is σ = 667376531264592. Its totient is φ = 667376531264590.

The previous prime is 667376531264519. The next prime is 667376531264609. The reversal of 667376531264591 is 195462135673766.

Together with previous prime (667376531264519) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667376531264591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667376531264291) 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 as a sum of consecutive naturals, namely, 333688265632295 + 333688265632296.

It is an arithmetic number, because the mean of its divisors is an integer number (333688265632296).

Almost surely, 2^{667376531264591} is an apocalyptic number.

667376531264591 is a deficient number, since it is larger than the sum of its proper divisors (1).

667376531264591 is an equidigital number, since it uses as much as digits as its factorization.

667376531264591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1028764800, while the sum is 71.

The spelling of 667376531264591 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, two hundred sixty-four thousand, five hundred ninety-one".