The Number Of Day
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Wednesday, December 9, 2009
669
669
= 3 x 223.
669
is the number of unsymmetrical ways to dissect a regular 12-gon into 10 triangles.
669
is 3033 in base 6 and 1235 in base 8.
669
is the number of primes less than 5,000.
NGC
669
is a galaxy in the constellation Triangulum.
Source:
What's Special About This Number?
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