Surah Ar Rahman
Surah Ar Rahman The Number of Letters=1647 Number of Letters + Number of Letters in Tasmia=1647+19=1666 where 16 is the number of Letters in the exalted name of Allah s.w.t i.e Zuljalal-e-Wal Ikram/Ziljalal-e-Wal Ikram. And 66 is the abjad number of Allah s.w.t name Allah (Arabic).