This number is a composite.
Single Curio View: (Seek other curios for this number)6466, made from a semiprime number of semiprime digit, is the largest known n for which the nth prime (64661) begins with the digits of n. Of course, delete the 4 and get the beastly 666. [Post]
Submitted: 2009-07-06 06:30:53; Last Modified: 2009-07-06 12:12:41.
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