6643033 has 2 divisors, whose sum is σ = 6643034. Its totient is φ = 6643032.

The previous prime is 6643019. The next prime is 6643051. The reversal of 6643033 is 3303466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5774409 + 868624 = 2403^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 6643033 - 2⁹ = 6642521 is a prime.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 6642989 and 6643007.

It is not a weakly prime, because it can be changed into another prime (6643333) 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, 3321516 + 3321517.

It is an arithmetic number, because the mean of its divisors is an integer number (3321517).

Almost surely, 2^6643033 is an apocalyptic number.

It is an amenable number.

6643033 is a deficient number, since it is larger than the sum of its proper divisors (1).

6643033 is an equidigital number, since it uses as much as digits as its factorization.

6643033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 6643033 is about 2577.4081942913. The cubic root of 6643033 is about 187.9845411312.

Adding to 6643033 its reverse (3303466), we get a palindrome (9946499).

The spelling of 6643033 in words is "six million, six hundred forty-three thousand, thirty-three".