6664446502393 has 2 divisors, whose sum is σ = 6664446502394. Its totient is φ = 6664446502392.

The previous prime is 6664446502387. The next prime is 6664446502397. The reversal of 6664446502393 is 3932056444666.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4439566992784 + 2224879509609 = 2107028^2 + 1491603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664446502393 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664446502397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332223251196 + 3332223251197.

It is an arithmetic number, because the mean of its divisors is an integer number (3332223251197).

Almost surely, 2^{6664446502393} is an apocalyptic number.

It is an amenable number.

6664446502393 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664446502393 is an equidigital number, since it uses as much as digits as its factorization.

6664446502393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67184640, while the sum is 58.

The spelling of 6664446502393 in words is "six trillion, six hundred sixty-four billion, four hundred forty-six million, five hundred two thousand, three hundred ninety-three".