6640664113 has 2 divisors, whose sum is σ = 6640664114. Its totient is φ = 6640664112.

The previous prime is 6640664089. The next prime is 6640664131. The reversal of 6640664113 is 3114660466.

6640664113 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (6640664131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6582401424 + 58262689 = 81132^2 + 7633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6640664113 is a prime.

It is not a weakly prime, because it can be changed into another prime (6640664153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320332056 + 3320332057.

It is an arithmetic number, because the mean of its divisors is an integer number (3320332057).

Almost surely, 2^6640664113 is an apocalyptic number.

It is an amenable number.

6640664113 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640664113 is an equidigital number, since it uses as much as digits as its factorization.

6640664113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 6640664113 is about 81490.2700510926. The cubic root of 6640664113 is about 1879.6219355396.

The spelling of 6640664113 in words is "six billion, six hundred forty million, six hundred sixty-four thousand, one hundred thirteen".