66448594439 has 2 divisors, whose sum is σ = 66448594440. Its totient is φ = 66448594438.

The previous prime is 66448594427. The next prime is 66448594451. The reversal of 66448594439 is 93449584466.

66448594439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (66448594427) and next prime (66448594451).

It is a cyclic number.

It is not a de Polignac number, because 66448594439 - 2⁴ = 66448594423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66448594939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33224297219 + 33224297220.

It is an arithmetic number, because the mean of its divisors is an integer number (33224297220).

Almost surely, 2^66448594439 is an apocalyptic number.

66448594439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66448594439 is an equidigital number, since it uses as much as digits as its factorization.

66448594439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89579520, while the sum is 62.

The spelling of 66448594439 in words is "sixty-six billion, four hundred forty-eight million, five hundred ninety-four thousand, four hundred thirty-nine".