6668505133 has 2 divisors, whose sum is σ = 6668505134. Its totient is φ = 6668505132.

The previous prime is 6668505121. The next prime is 6668505167. The reversal of 6668505133 is 3315058666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4127034564 + 2541470569 = 64242^2 + 50413^2 .

It is a cyclic number.

It is not a de Polignac number, because 6668505133 - 2²¹ = 6666407981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6668505133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668500133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334252566 + 3334252567.

It is an arithmetic number, because the mean of its divisors is an integer number (3334252567).

Almost surely, 2^6668505133 is an apocalyptic number.

It is an amenable number.

6668505133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668505133 is an equidigital number, since it uses as much as digits as its factorization.

6668505133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 6668505133 is about 81660.9155777720. The cubic root of 6668505133 is about 1882.2450481669.

The spelling of 6668505133 in words is "six billion, six hundred sixty-eight million, five hundred five thousand, one hundred thirty-three".