6605824681 has 2 divisors, whose sum is σ = 6605824682. Its totient is φ = 6605824680.

The previous prime is 6605824651. The next prime is 6605824717. The reversal of 6605824681 is 1864285066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6255386281 + 350438400 = 79091^2 + 18720^2 .

It is a cyclic number.

It is not a de Polignac number, because 6605824681 - 2⁵ = 6605824649 is a prime.

It is a super-2 number, since 2×6605824681² = 87273839432217503522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6605824651) 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, 3302912340 + 3302912341.

It is an arithmetic number, because the mean of its divisors is an integer number (3302912341).

Almost surely, 2^6605824681 is an apocalyptic number.

It is an amenable number.

6605824681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6605824681 is an equidigital number, since it uses as much as digits as its factorization.

6605824681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 6605824681 is about 81276.2245739798. The cubic root of 6605824681 is about 1876.3291014665.

The spelling of 6605824681 in words is "six billion, six hundred five million, eight hundred twenty-four thousand, six hundred eighty-one".