6648318133 has 2 divisors, whose sum is σ = 6648318134. Its totient is φ = 6648318132.

The previous prime is 6648318091. The next prime is 6648318167. The reversal of 6648318133 is 3318138466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4367491569 + 2280826564 = 66087^2 + 47758^2 .

It is a cyclic number.

It is not a de Polignac number, because 6648318133 - 2²¹ = 6646220981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6648318133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6648318533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324159066 + 3324159067.

It is an arithmetic number, because the mean of its divisors is an integer number (3324159067).

Almost surely, 2^6648318133 is an apocalyptic number.

It is an amenable number.

6648318133 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648318133 is an equidigital number, since it uses as much as digits as its factorization.

6648318133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 6648318133 is about 81537.2193111833. The cubic root of 6648318133 is about 1880.3438081229.

The spelling of 6648318133 in words is "six billion, six hundred forty-eight million, three hundred eighteen thousand, one hundred thirty-three".