65791 has 4 divisors (see below), whose sum is σ = 71784. Its totient is φ = 59800.

The previous prime is 65789. The next prime is 65809. The reversal of 65791 is 19756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65791 - 2¹ = 65789 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 (65701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (17946).

2⁶⁵⁷⁹¹ is an apocalyptic number.

65791 is a deficient number, since it is larger than the sum of its proper divisors (5993).

65791 is a wasteful number, since it uses less digits than its factorization.

65791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5992.

The product of its digits is 1890, while the sum is 28.

The square root of 65791 is about 256.4975633413. The cubic root of 65791 is about 40.3696975659.

It can be divided in two parts, 65 and 791, that multiplied together give a palindrome (51415).

The spelling of 65791 in words is "sixty-five thousand, seven hundred ninety-one".