659921130689 has 2 divisors, whose sum is σ = 659921130690. Its totient is φ = 659921130688.

The previous prime is 659921130641. The next prime is 659921130793. The reversal of 659921130689 is 986031129956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536732064400 + 123189066289 = 732620^2 + 350983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659921130689 is a prime.

It is a super-2 number, since 2×659921130689² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (659921130619) 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, 329960565344 + 329960565345.

It is an arithmetic number, because the mean of its divisors is an integer number (329960565345).

Almost surely, 2^659921130689 is an apocalyptic number.

It is an amenable number.

659921130689 is a deficient number, since it is larger than the sum of its proper divisors (1).

659921130689 is an equidigital number, since it uses as much as digits as its factorization.

659921130689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The spelling of 659921130689 in words is "six hundred fifty-nine billion, nine hundred twenty-one million, one hundred thirty thousand, six hundred eighty-nine".