6 Wikipedia. 6 ( six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. [1] In mathematics [ edit].
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The number six is a natural number that comes after the number five and before the number seven. Six is also the first perfect number which means that the sum of its factors (1, 2 and 3) are equal to the number itself (6). The next perfect number.