The Number 1661: Properties and MeaningsPrime Factors of 1661=11x151.
1661 is a 32-gonal Number.
United Nations Security Council Resolution 1661, adopted unanimously on March 14, 2006, after reaffirming all resolutions on the situation between Eritrea and Ethiopia.
The Year 1661 ADIn the year 1661 AD the first modern bank notes were issued in Stockholm, Sweden.
In the year 1661 AD Shunzhi Emperor of China died.
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