667883168591 has 2 divisors, whose sum is σ = 667883168592. Its totient is φ = 667883168590.

The previous prime is 667883168543. The next prime is 667883168593. The reversal of 667883168591 is 195861388766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667883168591 is a prime.

It is a Sophie Germain prime.

Together with 667883168593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667883168593) 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, 333941584295 + 333941584296.

It is an arithmetic number, because the mean of its divisors is an integer number (333941584296).

Almost surely, 2^667883168591 is an apocalyptic number.

667883168591 is a deficient number, since it is larger than the sum of its proper divisors (1).

667883168591 is an equidigital number, since it uses as much as digits as its factorization.

667883168591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104509440, while the sum is 68.

The spelling of 667883168591 in words is "six hundred sixty-seven billion, eight hundred eighty-three million, one hundred sixty-eight thousand, five hundred ninety-one".