65691693537629 has 2 divisors, whose sum is σ = 65691693537630. Its totient is φ = 65691693537628.

The previous prime is 65691693537583. The next prime is 65691693537649. The reversal of 65691693537629 is 92673539619656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49369875376900 + 16321818160729 = 7026370^2 + 4040027^2 .

It is a cyclic number.

It is not a de Polignac number, because 65691693537629 - 2²⁰ = 65691692489053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65691693537629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65691693537649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32845846768814 + 32845846768815.

It is an arithmetic number, because the mean of its divisors is an integer number (32845846768815).

Almost surely, 2^{65691693537629} is an apocalyptic number.

It is an amenable number.

65691693537629 is a deficient number, since it is larger than the sum of its proper divisors (1).

65691693537629 is an equidigital number, since it uses as much as digits as its factorization.

65691693537629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2976069600, while the sum is 77.

The spelling of 65691693537629 in words is "sixty-five trillion, six hundred ninety-one billion, six hundred ninety-three million, five hundred thirty-seven thousand, six hundred twenty-nine".