65705791 has 2 divisors, whose sum is σ = 65705792. Its totient is φ = 65705790.

The previous prime is 65705753. The next prime is 65705797. The reversal of 65705791 is 19750756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65705791 - 2⁹ = 65705279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65705797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32852895 + 32852896.

It is an arithmetic number, because the mean of its divisors is an integer number (32852896).

Almost surely, 2^65705791 is an apocalyptic number.

65705791 is a deficient number, since it is larger than the sum of its proper divisors (1).

65705791 is an equidigital number, since it uses as much as digits as its factorization.

65705791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 65705791 is about 8105.9108680024. The cubic root of 65705791 is about 403.5226180887.

The spelling of 65705791 in words is "sixty-five million, seven hundred five thousand, seven hundred ninety-one".