65637713 has 2 divisors, whose sum is σ = 65637714. Its totient is φ = 65637712.

The previous prime is 65637707. The next prime is 65637721. The reversal of 65637713 is 31773656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65399569 + 238144 = 8087^2 + 488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65637713 is a prime.

It is not a weakly prime, because it can be changed into another prime (65637743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32818856 + 32818857.

It is an arithmetic number, because the mean of its divisors is an integer number (32818857).

Almost surely, 2^65637713 is an apocalyptic number.

It is an amenable number.

65637713 is a deficient number, since it is larger than the sum of its proper divisors (1).

65637713 is an equidigital number, since it uses as much as digits as its factorization.

65637713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 38.

The square root of 65637713 is about 8101.7104984071. The cubic root of 65637713 is about 403.3832061969.

The spelling of 65637713 in words is "sixty-five million, six hundred thirty-seven thousand, seven hundred thirteen".