1111661domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that contain digits 1 and 6 only.at n=12A020454Smallest n-digit prime containing only digits 1 and 6, or 0 if no such prime exists.at n=6A036933Palindromic primes in the sense of A007500 with digits '0', '1' and '6' only.at n=22A199306Prime numbersat n=86577