The Number 70: Properties and MeaningsPrime Factors of 70=2x5x7.
70 is a Pentagonal Number.
70 is a 13-gonal Number.
70 is a Centered 23-gonal Number.
70 is an Abundant Number.
The Chemical Element Ytterbium has an atomic number of 70.
The Year 70 ADIn the year 70 AD Titus and his Roman legions breached the middle wall of Jerusalem.
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