669389808983963 has 2 divisors, whose sum is σ = 669389808983964. Its totient is φ = 669389808983962.

The previous prime is 669389808983953. The next prime is 669389808983993. The reversal of 669389808983963 is 369389808983966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669389808983963 - 2¹² = 669389808979867 is a prime.

It is not a weakly prime, because it can be changed into another prime (669389808983953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334694904491981 + 334694904491982.

It is an arithmetic number, because the mean of its divisors is an integer number (334694904491982).

Almost surely, 2^{669389808983963} is an apocalyptic number.

669389808983963 is a deficient number, since it is larger than the sum of its proper divisors (1).

669389808983963 is an equidigital number, since it uses as much as digits as its factorization.

669389808983963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156728328192, while the sum is 95.

The spelling of 669389808983963 in words is "six hundred sixty-nine trillion, three hundred eighty-nine billion, eight hundred eight million, nine hundred eighty-three thousand, nine hundred sixty-three".