666666

This number is a composite.

Single Curio View:   (Seek other curios for this number)
The only six-digit repdigit such that the sum of itself and all truncations of itself plus one is an emirp. [Bajpai]

Submitted: 2015-03-03 17:23:17;   Last Modified: 2016-07-31 15:35:23.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell