6643427113 has 2 divisors, whose sum is σ = 6643427114. Its totient is φ = 6643427112.

The previous prime is 6643427099. The next prime is 6643427117. The reversal of 6643427113 is 3117243466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4709802384 + 1933624729 = 68628^2 + 43973^2 .

It is a cyclic number.

It is not a de Polignac number, because 6643427113 - 2¹⁷ = 6643296041 is a prime.

It is not a weakly prime, because it can be changed into another prime (6643427117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321713556 + 3321713557.

It is an arithmetic number, because the mean of its divisors is an integer number (3321713557).

Almost surely, 2^6643427113 is an apocalyptic number.

It is an amenable number.

6643427113 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643427113 is an equidigital number, since it uses as much as digits as its factorization.

6643427113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 6643427113 is about 81507.2212322319. The cubic root of 6643427113 is about 1879.8825859409.

The spelling of 6643427113 in words is "six billion, six hundred forty-three million, four hundred twenty-seven thousand, one hundred thirteen".