6640134133 has 2 divisors, whose sum is σ = 6640134134. Its totient is φ = 6640134132.

The previous prime is 6640134119. The next prime is 6640134169. The reversal of 6640134133 is 3314310466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6605300529 + 34833604 = 81273^2 + 5902^2 .

It is a cyclic number.

It is not a de Polignac number, because 6640134133 - 2⁵ = 6640134101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6640134095 and 6640134104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6640134113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320067066 + 3320067067.

It is an arithmetic number, because the mean of its divisors is an integer number (3320067067).

Almost surely, 2^6640134133 is an apocalyptic number.

It is an amenable number.

6640134133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640134133 is an equidigital number, since it uses as much as digits as its factorization.

6640134133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 6640134133 is about 81487.0181869480. The cubic root of 6640134133 is about 1879.5719310763.

Adding to 6640134133 its reverse (3314310466), we get a palindrome (9954444599).

The spelling of 6640134133 in words is "six billion, six hundred forty million, one hundred thirty-four thousand, one hundred thirty-three".