6628118257 has 2 divisors, whose sum is σ = 6628118258. Its totient is φ = 6628118256.

The previous prime is 6628118243. The next prime is 6628118279. The reversal of 6628118257 is 7528118266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4793623696 + 1834494561 = 69236^2 + 42831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6628118257 is a prime.

It is not a weakly prime, because it can be changed into another prime (6628118207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314059128 + 3314059129.

It is an arithmetic number, because the mean of its divisors is an integer number (3314059129).

Almost surely, 2^6628118257 is an apocalyptic number.

It is an amenable number.

6628118257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628118257 is an equidigital number, since it uses as much as digits as its factorization.

6628118257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 6628118257 is about 81413.2560275045. The cubic root of 6628118257 is about 1878.4374991766.

Subtracting 6628118257 from its reverse (7528118266), we obtain a palindrome (900000009).

The spelling of 6628118257 in words is "six billion, six hundred twenty-eight million, one hundred eighteen thousand, two hundred fifty-seven".