766631960639 has 2 divisors, whose sum is σ = 766631960640. Its totient is φ = 766631960638.

The previous prime is 766631960629. The next prime is 766631960641. The reversal of 766631960639 is 936069136667.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 766631960639 - 2²⁰ = 766630912063 is a prime.

Together with 766631960641, 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 (766631960609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383315980319 + 383315980320.

It is an arithmetic number, because the mean of its divisors is an integer number (383315980320).

Almost surely, 2^766631960639 is an apocalyptic number.

766631960639 is a deficient number, since it is larger than the sum of its proper divisors (1).

766631960639 is an equidigital number, since it uses as much as digits as its factorization.

766631960639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39680928, while the sum is 62.

It can be divided in two parts, 76663 and 1960639, that added together give a palindrome (2037302).

The spelling of 766631960639 in words is "seven hundred sixty-six billion, six hundred thirty-one million, nine hundred sixty thousand, six hundred thirty-nine".