Welcome to our forum!
You have chosen a nice number. I remember well when I was studying Hebrew Gematria and found that the full spelling of Messiah = Mem (90) + Shin (360) + Yod (20) + Chet (418) = 888 = Jesus (in Greek).
Thanks for sharing your analysis of the 66th triangular number Tri(66) = 2211. It is intriguing that it links back to a number with a prominent 22 and 11. As it turns out, there is a deep connection between the gematria of Genesis 1:1-5, John 1:1-5 and repdigits like 888, 22, 11, 999, and so forth. I talk about this here.
While I agree that the number sequence 227668881 contains very significant numbers (22)(7)(66)(888)(1), I'm not particularly confident that it was "designed" as such since I had no motivation for multiplying the sums of the book numbers and many other combinations would have "seemed" significant. E.g. 722668881 or 226678881 or 88877722661 ... etc. There are so many possibilities, it is hard to discern between design and chance in cases like this. But I'm glad you to have another "number head" to share insights with!
All the very best,