6628688797 has 2 divisors, whose sum is σ = 6628688798. Its totient is φ = 6628688796.

The previous prime is 6628688771. The next prime is 6628688809. The reversal of 6628688797 is 7978868266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3771679396 + 2857009401 = 61414^2 + 53451^2 .

It is a cyclic number.

It is not a de Polignac number, because 6628688797 - 2³¹ = 4481205149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6628688597) 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, 3314344398 + 3314344399.

It is an arithmetic number, because the mean of its divisors is an integer number (3314344399).

Almost surely, 2^6628688797 is an apocalyptic number.

It is an amenable number.

6628688797 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628688797 is an equidigital number, since it uses as much as digits as its factorization.

6628688797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97542144, while the sum is 67.

The square root of 6628688797 is about 81416.7599269340. The cubic root of 6628688797 is about 1878.4913954681.

The spelling of 6628688797 in words is "six billion, six hundred twenty-eight million, six hundred eighty-eight thousand, seven hundred ninety-seven".