Number #383383MYTHIC

Perfect 6-digit palindrome (e.g. 123321, 582285)

Contains 4 identical digits (e.g. 333391)

First 3 digits repeat in the second half (e.g. 456456)

Only 2 unique digit types across all 6 positions

Every digit belongs to Fibonacci {0, 1, 2, 3, 5, 8}