The Roman numeral MDCLXIV corresponds to the Arabic number 1664.
MDCLXIV = 1664
Symbols are written and read from left to right, from highest to lowest.
If number MDCLXIV is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 1664.
MDCLXIII is number 1663
MDCLXV is number 1665
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