Infinity is not a number; it is a concept. There is no highest number, because you can always add 1 to it and create a higher number. If this new number is the highest number, then add 1 again and it isn't. The process can never end, so infinity is used to describe the idea: a process that never ends.
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Infinity
There is no "Highest" number, as they go on into infinity.
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Infinity. newtest3 Infnity and beyond
The highest number that both 63 and 14 go into is infinity. They go into infinity an infinite number of times (as does every other number). I'm not sure if you have asked the right question, but if you have then the answer is infinity. If, however, you meant, "what is the highest common factor of both 63 & 14?", then the answer is 7. 63 = 9 * 7 and 14 = 2 * 7.