65689337969 has 2 divisors, whose sum is σ = 65689337970. Its totient is φ = 65689337968.

The previous prime is 65689337941. The next prime is 65689337971. The reversal of 65689337969 is 96973398656.

65689337969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51398330944 + 14291007025 = 226712^2 + 119545^2 .

It is a cyclic number.

It is not a de Polignac number, because 65689337969 - 2²⁰ = 65688289393 is a prime.

It is a super-2 number, since 2×65689337969² (a number of 22 digits) contains 22 as substring.

Together with 65689337971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65689337999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32844668984 + 32844668985.

It is an arithmetic number, because the mean of its divisors is an integer number (32844668985).

Almost surely, 2^65689337969 is an apocalyptic number.

It is an amenable number.

65689337969 is a deficient number, since it is larger than the sum of its proper divisors (1).

65689337969 is an equidigital number, since it uses as much as digits as its factorization.

65689337969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396809280, while the sum is 71.

The spelling of 65689337969 in words is "sixty-five billion, six hundred eighty-nine million, three hundred thirty-seven thousand, nine hundred sixty-nine".