65689337971 has 2 divisors, whose sum is σ = 65689337972. Its totient is φ = 65689337970.

The previous prime is 65689337969. The next prime is 65689337999. The reversal of 65689337971 is 17973398656.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65689337971 - 2¹ = 65689337969 is a prime.

Together with 65689337969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65689337941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32844668985 + 32844668986.

It is an arithmetic number, because the mean of its divisors is an integer number (32844668986).

Almost surely, 2^65689337971 is an apocalyptic number.

65689337971 is a deficient number, since it is larger than the sum of its proper divisors (1).

65689337971 is an equidigital number, since it uses as much as digits as its factorization.

65689337971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51438240, while the sum is 64.

The spelling of 65689337971 in words is "sixty-five billion, six hundred eighty-nine million, three hundred thirty-seven thousand, nine hundred seventy-one".