65791261 has 2 divisors, whose sum is σ = 65791262. Its totient is φ = 65791260.

The previous prime is 65791249. The next prime is 65791267. The reversal of 65791261 is 16219756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48734361 + 17056900 = 6981^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 65791261 - 2²⁵ = 32236829 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65791261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65791267) 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 as a sum of consecutive naturals, namely, 32895630 + 32895631.

It is an arithmetic number, because the mean of its divisors is an integer number (32895631).

Almost surely, 2^65791261 is an apocalyptic number.

It is an amenable number.

65791261 is a deficient number, since it is larger than the sum of its proper divisors (1).

65791261 is an equidigital number, since it uses as much as digits as its factorization.

65791261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 65791261 is about 8111.1812333346. The cubic root of 65791261 is about 403.6975094947.

The spelling of 65791261 in words is "sixty-five million, seven hundred ninety-one thousand, two hundred sixty-one".