65414756613721 has 2 divisors, whose sum is σ = 65414756613722. Its totient is φ = 65414756613720.

The previous prime is 65414756613719. The next prime is 65414756613751. The reversal of 65414756613721 is 12731665741456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58321248817225 + 7093507796496 = 7636835^2 + 2663364^2 .

It is a cyclic number.

It is not a de Polignac number, because 65414756613721 - 2¹ = 65414756613719 is a prime.

Together with 65414756613719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65414756613751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32707378306860 + 32707378306861.

It is an arithmetic number, because the mean of its divisors is an integer number (32707378306861).

Almost surely, 2^{65414756613721} is an apocalyptic number.

It is an amenable number.

65414756613721 is a deficient number, since it is larger than the sum of its proper divisors (1).

65414756613721 is an equidigital number, since it uses as much as digits as its factorization.

65414756613721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 58.

The spelling of 65414756613721 in words is "sixty-five trillion, four hundred fourteen billion, seven hundred fifty-six million, six hundred thirteen thousand, seven hundred twenty-one".