65706917 has 2 divisors, whose sum is σ = 65706918. Its totient is φ = 65706916.

The previous prime is 65706911. The next prime is 65706919. The reversal of 65706917 is 71960756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58232161 + 7474756 = 7631^2 + 2734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65706917 is a prime.

Together with 65706919, 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 (65706911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32853458 + 32853459.

It is an arithmetic number, because the mean of its divisors is an integer number (32853459).

Almost surely, 2^65706917 is an apocalyptic number.

It is an amenable number.

65706917 is a deficient number, since it is larger than the sum of its proper divisors (1).

65706917 is an equidigital number, since it uses as much as digits as its factorization.

65706917 is an evil number, because the sum of its binary digits is even.

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

The square root of 65706917 is about 8105.9803231935. The cubic root of 65706917 is about 403.5249231309.

The spelling of 65706917 in words is "sixty-five million, seven hundred six thousand, nine hundred seventeen".