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The Number 75: Properties and MeaningsPrime Factors of 75=3x5x5.
75 is a Nonagonal Number.
75 is a 26-gonal Number.
75 is a Pentagonal Pyramidal Number.
The Chemical Element Rhenium has an atomic number of 75.
The Year 75 ADIn the year 75 AD the Welsh town of Caerwent was founded by the Romans.
In the year 75 AD Suetonius a Roman historian was born.
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