65716709 has 2 divisors, whose sum is σ = 65716710. Its totient is φ = 65716708.

The previous prime is 65716691. The next prime is 65716711. The reversal of 65716709 is 90761756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 30492484 = 5935^2 + 5522^2 .

It is a cyclic number.

It is not a de Polignac number, because 65716709 - 2²⁰ = 64668133 is a prime.

Together with 65716711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65716789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32858354 + 32858355.

It is an arithmetic number, because the mean of its divisors is an integer number (32858355).

Almost surely, 2^65716709 is an apocalyptic number.

It is an amenable number.

65716709 is a deficient number, since it is larger than the sum of its proper divisors (1).

65716709 is an equidigital number, since it uses as much as digits as its factorization.

65716709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 65716709 is about 8106.5842991978. The cubic root of 65716709 is about 403.5449672905.

The spelling of 65716709 in words is "sixty-five million, seven hundred sixteen thousand, seven hundred nine".