65717719 has 2 divisors, whose sum is σ = 65717720. Its totient is φ = 65717718.

The previous prime is 65717669. The next prime is 65717753. The reversal of 65717719 is 91771756.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65717719 - 2²¹ = 63620567 is a prime.

It is a super-2 number, since 2×65717719² = 8637637181125922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65717759) 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, 32858859 + 32858860.

It is an arithmetic number, because the mean of its divisors is an integer number (32858860).

Almost surely, 2^65717719 is an apocalyptic number.

65717719 is a deficient number, since it is larger than the sum of its proper divisors (1).

65717719 is an equidigital number, since it uses as much as digits as its factorization.

65717719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92610, while the sum is 43.

The square root of 65717719 is about 8106.6465939993. The cubic root of 65717719 is about 403.5470346405.

The spelling of 65717719 in words is "sixty-five million, seven hundred seventeen thousand, seven hundred nineteen".