6664885133 has 2 divisors, whose sum is σ = 6664885134. Its totient is φ = 6664885132.

The previous prime is 6664885111. The next prime is 6664885141. The reversal of 6664885133 is 3315884666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6352408804 + 312476329 = 79702^2 + 17677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664885133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6664885153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332442566 + 3332442567.

It is an arithmetic number, because the mean of its divisors is an integer number (3332442567).

Almost surely, 2^6664885133 is an apocalyptic number.

It is an amenable number.

6664885133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664885133 is an equidigital number, since it uses as much as digits as its factorization.

6664885133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The square root of 6664885133 is about 81638.7477427232. The cubic root of 6664885133 is about 1881.9043940895.

The spelling of 6664885133 in words is "six billion, six hundred sixty-four million, eight hundred eighty-five thousand, one hundred thirty-three".