65889605209 has 2 divisors, whose sum is σ = 65889605210. Its totient is φ = 65889605208.

The previous prime is 65889605207. The next prime is 65889605231. The reversal of 65889605209 is 90250698856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48486718809 + 17402886400 = 220197^2 + 131920^2 .

It is a cyclic number.

It is not a de Polignac number, because 65889605209 - 2¹ = 65889605207 is a prime.

Together with 65889605207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65889605207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32944802604 + 32944802605.

It is an arithmetic number, because the mean of its divisors is an integer number (32944802605).

Almost surely, 2^65889605209 is an apocalyptic number.

It is an amenable number.

65889605209 is a deficient number, since it is larger than the sum of its proper divisors (1).

65889605209 is an equidigital number, since it uses as much as digits as its factorization.

65889605209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 65889605209 in words is "sixty-five billion, eight hundred eighty-nine million, six hundred five thousand, two hundred nine".