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<679 Number Data-Base
Random Number 		681>

The Number 680: Properties and Meanings

Prime Factors of 680=2x2x2x5x17.

680 is a 26-gonal Number.

680 is a Tetrahedral Number.

680 is the smallest tetrahedral number that is also the sum of 2 Tetrahedral Numbers.


The Year 680 AD

In the year 680 AD...

<679 Number Data-Base
Random Number 		681>
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