65995939 has 2 divisors, whose sum is σ = 65995940. Its totient is φ = 65995938.

The previous prime is 65995933. The next prime is 65995981. The reversal of 65995939 is 93959956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65995939 - 2⁵ = 65995907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65995939.

It is not a weakly prime, because it can be changed into another prime (65995933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32997969 + 32997970.

It is an arithmetic number, because the mean of its divisors is an integer number (32997970).

Almost surely, 2^65995939 is an apocalyptic number.

65995939 is a deficient number, since it is larger than the sum of its proper divisors (1).

65995939 is an equidigital number, since it uses as much as digits as its factorization.

65995939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2952450, while the sum is 55.

The square root of 65995939 is about 8123.7884635187. The cubic root of 65995939 is about 404.1157132681.

It can be divided in two parts, 65 and 995939, that added together give a square (996004 = 998²).

The spelling of 65995939 in words is "sixty-five million, nine hundred ninety-five thousand, nine hundred thirty-nine".