[VA] Short & Sweet Math Challenge #22: April 1st, 2018 Spring Special

[J-F Garnier]

After the desserts, back to the main course!

I have a nice little HP71 program that is able to output the (assumed) correct result for each of the six test numbers.
However, I will not publish my very clever program here, just the results as NO or YES:
8082737769637879 NO
89698373657765787367698082737769 YES
677977807983738469788577666982 NO
7365778082737769847979 YES
677977807983738469658387697676 NO
7378686969688082737769 YES

:-)
J-F