Abstract: The number seven mentioned in many religions, also it’s the lucky number for others. 7 is that the solely dimension, besides the acquainted three, within which a vector are often outlined. Seven is that the lowest number that can't be painted because the total of the squares of 3 integers. In the present article, we endeavors to shed light on the mathematical relationships, that shows the relationship between numbers 6, 7 and with the different ranks, consisting of the one digit or two digits and so on if we repeater to make it consist of six digits or its double- digit all of them are divisible by 7.