667623527758679 has 2 divisors, whose sum is σ = 667623527758680. Its totient is φ = 667623527758678.

The previous prime is 667623527758619. The next prime is 667623527758687. The reversal of 667623527758679 is 976857725326766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667623527758679 - 2²⁴ = 667623510981463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667623527758679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667623527758619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333811763879339 + 333811763879340.

It is an arithmetic number, because the mean of its divisors is an integer number (333811763879340).

Almost surely, 2^{667623527758679} is an apocalyptic number.

667623527758679 is a deficient number, since it is larger than the sum of its proper divisors (1).

667623527758679 is an equidigital number, since it uses as much as digits as its factorization.

667623527758679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67212633600, while the sum is 86.

The spelling of 667623527758679 in words is "six hundred sixty-seven trillion, six hundred twenty-three billion, five hundred twenty-seven million, seven hundred fifty-eight thousand, six hundred seventy-nine".