65684737 has 2 divisors, whose sum is σ = 65684738. Its totient is φ = 65684736.

The previous prime is 65684701. The next prime is 65684741. The reversal of 65684737 is 73748656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 8667136 = 7551^2 + 2944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65684737 is a prime.

It is not a weakly prime, because it can be changed into another prime (65684777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32842368 + 32842369.

It is an arithmetic number, because the mean of its divisors is an integer number (32842369).

Almost surely, 2^65684737 is an apocalyptic number.

It is an amenable number.

65684737 is a deficient number, since it is larger than the sum of its proper divisors (1).

65684737 is an equidigital number, since it uses as much as digits as its factorization.

65684737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The square root of 65684737 is about 8104.6120820185. The cubic root of 65684737 is about 403.4795134518.

The spelling of 65684737 in words is "sixty-five million, six hundred eighty-four thousand, seven hundred thirty-seven".