66395339 has 2 divisors, whose sum is σ = 66395340. Its totient is φ = 66395338.

The previous prime is 66395317. The next prime is 66395341. The reversal of 66395339 is 93359366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66395339 is a prime.

Together with 66395341, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66395339.

It is not a weakly prime, because it can be changed into another prime (66395639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33197669 + 33197670.

It is an arithmetic number, because the mean of its divisors is an integer number (33197670).

Almost surely, 2^66395339 is an apocalyptic number.

66395339 is a deficient number, since it is larger than the sum of its proper divisors (1).

66395339 is an equidigital number, since it uses as much as digits as its factorization.

66395339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 44.

The square root of 66395339 is about 8148.3335106020. Note that the first 3 decimals coincide. The cubic root of 66395339 is about 404.9292951813.

The spelling of 66395339 in words is "sixty-six million, three hundred ninety-five thousand, three hundred thirty-nine".