65006551621169 has 2 divisors, whose sum is σ = 65006551621170. Its totient is φ = 65006551621168.

The previous prime is 65006551621127. The next prime is 65006551621243. The reversal of 65006551621169 is 96112615560056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62807796468769 + 2198755152400 = 7925137^2 + 1482820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65006551621169 is a prime.

It is a super-2 number, since 2×65006551621169² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65006551621169.

It is not a weakly prime, because it can be changed into another prime (65006551626169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32503275810584 + 32503275810585.

It is an arithmetic number, because the mean of its divisors is an integer number (32503275810585).

Almost surely, 2^{65006551621169} is an apocalyptic number.

It is an amenable number.

65006551621169 is a deficient number, since it is larger than the sum of its proper divisors (1).

65006551621169 is an equidigital number, since it uses as much as digits as its factorization.

65006551621169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916000, while the sum is 53.

The spelling of 65006551621169 in words is "sixty-five trillion, six billion, five hundred fifty-one million, six hundred twenty-one thousand, one hundred sixty-nine".