66384713 has 2 divisors, whose sum is σ = 66384714. Its totient is φ = 66384712.

The previous prime is 66384707. The next prime is 66384719. The reversal of 66384713 is 31748366.

It is a balanced prime because it is at equal distance from previous prime (66384707) and next prime (66384719).

It can be written as a sum of positive squares in only one way, i.e., 43983424 + 22401289 = 6632^2 + 4733^2 .

It is a cyclic number.

It is not a de Polignac number, because 66384713 - 2⁶ = 66384649 is a prime.

It is not a weakly prime, because it can be changed into another prime (66384719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33192356 + 33192357.

It is an arithmetic number, because the mean of its divisors is an integer number (33192357).

Almost surely, 2^66384713 is an apocalyptic number.

It is an amenable number.

66384713 is a deficient number, since it is larger than the sum of its proper divisors (1).

66384713 is an equidigital number, since it uses as much as digits as its factorization.

66384713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 66384713 is about 8147.6814493450. The cubic root of 66384713 is about 404.9076922179.

The spelling of 66384713 in words is "sixty-six million, three hundred eighty-four thousand, seven hundred thirteen".