6690

6690 is a natural number that follows 6689 and precedes 6691. It is an even and composite integer.

Its prime factorization is 2 × 3 × 5 × 223, so 6690 = 30 × 223. Consequently, it is divisible by 2, 3 and 5, and by any product of these factors such as 6, 10, 15, and 30. The sum of its digits is 21, which confirms divisibility by 3 but not by 9. Since the last digit is 0, the number is also divisible by 2 and 5, and by 10.

In binary, 6690 is 1101000100010. This representation reflects its decomposition into powers of two, as indicated by its prime factorization.

In mathematics, 6690 is used as an example of a composite number with several small prime factors. It illustrates standard divisibility rules in base 10 and how factorization can be derived from these rules. There are no widely noted mathematical constants, sequences, or named objects uniquely associated with the number 6690.