667376531135591 has 2 divisors, whose sum is σ = 667376531135592. Its totient is φ = 667376531135590.

The previous prime is 667376531135543. The next prime is 667376531135617. The reversal of 667376531135591 is 195531135673766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667376531135591 - 2³⁰ = 667375457393767 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 (667376561135591) 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, 333688265567795 + 333688265567796.

It is an arithmetic number, because the mean of its divisors is an integer number (333688265567796).

Almost surely, 2^{667376531135591} is an apocalyptic number.

667376531135591 is a deficient number, since it is larger than the sum of its proper divisors (1).

667376531135591 is an equidigital number, since it uses as much as digits as its factorization.

667376531135591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 321489000, while the sum is 68.

The spelling of 667376531135591 in words is "six hundred sixty-seven trillion, three hundred seventy-six billion, five hundred thirty-one million, one hundred thirty-five thousand, five hundred ninety-one".