65717471 has 2 divisors, whose sum is σ = 65717472. Its totient is φ = 65717470.

The previous prime is 65717437. The next prime is 65717473. The reversal of 65717471 is 17471756.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65717471 is a prime.

It is a super-3 number, since 3×65717471³ (a number of 24 digits) contains 333 as substring.

Together with 65717473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65717473) 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, 32858735 + 32858736.

It is an arithmetic number, because the mean of its divisors is an integer number (32858736).

Almost surely, 2^65717471 is an apocalyptic number.

65717471 is a deficient number, since it is larger than the sum of its proper divisors (1).

65717471 is an equidigital number, since it uses as much as digits as its factorization.

65717471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 38.

The square root of 65717471 is about 8106.6312978943. The cubic root of 65717471 is about 403.5465270159.

The spelling of 65717471 in words is "sixty-five million, seven hundred seventeen thousand, four hundred seventy-one".