6618320897 has 2 divisors, whose sum is σ = 6618320898. Its totient is φ = 6618320896.

The previous prime is 6618320873. The next prime is 6618320899. The reversal of 6618320897 is 7980238166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5059334641 + 1558986256 = 71129^2 + 39484^2 .

It is a cyclic number.

It is not a de Polignac number, because 6618320897 - 2⁸ = 6618320641 is a prime.

Together with 6618320899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6618320899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309160448 + 3309160449.

It is an arithmetic number, because the mean of its divisors is an integer number (3309160449).

Almost surely, 2^6618320897 is an apocalyptic number.

It is an amenable number.

6618320897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6618320897 is an equidigital number, since it uses as much as digits as its factorization.

6618320897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 6618320897 is about 81353.0632305877. The cubic root of 6618320897 is about 1877.5115046491.

The spelling of 6618320897 in words is "six billion, six hundred eighteen million, three hundred twenty thousand, eight hundred ninety-seven".