65664407161237 has 2 divisors, whose sum is σ = 65664407161238. Its totient is φ = 65664407161236.

The previous prime is 65664407161231. The next prime is 65664407161343. The reversal of 65664407161237 is 73216170446656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47000978987076 + 18663428174161 = 6855726^2 + 4320119^2 .

It is a cyclic number.

It is not a de Polignac number, because 65664407161237 - 2¹⁵ = 65664407128469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65664407161231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32832203580618 + 32832203580619.

It is an arithmetic number, because the mean of its divisors is an integer number (32832203580619).

Almost surely, 2^{65664407161237} is an apocalyptic number.

It is an amenable number.

65664407161237 is a deficient number, since it is larger than the sum of its proper divisors (1).

65664407161237 is an equidigital number, since it uses as much as digits as its factorization.

65664407161237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 65664407161237 in words is "sixty-five trillion, six hundred sixty-four billion, four hundred seven million, one hundred sixty-one thousand, two hundred thirty-seven".