65775719 has 2 divisors, whose sum is σ = 65775720. Its totient is φ = 65775718.

The previous prime is 65775679. The next prime is 65775763. The reversal of 65775719 is 91757756.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65775719 - 2²⁴ = 48998503 is a prime.

It is a super-2 number, since 2×65775719² = 8652890419933922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65775319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32887859 + 32887860.

It is an arithmetic number, because the mean of its divisors is an integer number (32887860).

Almost surely, 2^65775719 is an apocalyptic number.

65775719 is a deficient number, since it is larger than the sum of its proper divisors (1).

65775719 is an equidigital number, since it uses as much as digits as its factorization.

65775719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 463050, while the sum is 47.

The square root of 65775719 is about 8110.2231165363. The cubic root of 65775719 is about 403.6657182369.

The spelling of 65775719 in words is "sixty-five million, seven hundred seventy-five thousand, seven hundred nineteen".