6646775713 has 2 divisors, whose sum is σ = 6646775714. Its totient is φ = 6646775712.

The previous prime is 6646775711. The next prime is 6646775747. The reversal of 6646775713 is 3175776466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6183148689 + 463627024 = 78633^2 + 21532^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646775713 - 2¹ = 6646775711 is a prime.

Together with 6646775711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6646775711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323387856 + 3323387857.

It is an arithmetic number, because the mean of its divisors is an integer number (3323387857).

Almost surely, 2^6646775713 is an apocalyptic number.

It is an amenable number.

6646775713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646775713 is an equidigital number, since it uses as much as digits as its factorization.

6646775713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 52.

The square root of 6646775713 is about 81527.7603825838. The cubic root of 6646775713 is about 1880.1983826605.

The spelling of 6646775713 in words is "six billion, six hundred forty-six million, seven hundred seventy-five thousand, seven hundred thirteen".