65965517 has 6 divisors (see below), whose sum is σ = 68319498. Its totient is φ = 63690032.

The previous prime is 65965513. The next prime is 65965531. The reversal of 65965517 is 71556956.

It can be written as a sum of positive squares in 3 ways, for example, as 4405801 + 61559716 = 2099^2 + 7846^2 .

It is not a de Polignac number, because 65965517 - 2² = 65965513 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65965513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38378 + ... + 40059.

It is an arithmetic number, because the mean of its divisors is an integer number (11386583).

Almost surely, 2^65965517 is an apocalyptic number.

It is an amenable number.

65965517 is a deficient number, since it is larger than the sum of its proper divisors (2353981).

65965517 is an equidigital number, since it uses as much as digits as its factorization.

65965517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78495 (or 78466 counting only the distinct ones).

The product of its digits is 283500, while the sum is 44.

The square root of 65965517 is about 8121.9158454148. The cubic root of 65965517 is about 404.0536089531.

The spelling of 65965517 in words is "sixty-five million, nine hundred sixty-five thousand, five hundred seventeen".