65939911 has 2 divisors, whose sum is σ = 65939912. Its totient is φ = 65939910.

The previous prime is 65939903. The next prime is 65939953. The reversal of 65939911 is 11993956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65939911 - 2³ = 65939903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65939981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32969955 + 32969956.

It is an arithmetic number, because the mean of its divisors is an integer number (32969956).

Almost surely, 2^65939911 is an apocalyptic number.

65939911 is a deficient number, since it is larger than the sum of its proper divisors (1).

65939911 is an equidigital number, since it uses as much as digits as its factorization.

65939911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 43.

The square root of 65939911 is about 8120.3393402000. The cubic root of 65939911 is about 404.0013213531.

The spelling of 65939911 in words is "sixty-five million, nine hundred thirty-nine thousand, nine hundred eleven".