The king during  the 166th year of the Rattanakosin Kingdom of Thailand served for how many years and days?
1948 in Thailand:  It was the 2nd year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2491 (1 January – 31 March) and 2492 (1 April – 31 December) in the Buddhist Era. Bhumibol Adulyadej:  Reigning since 9 June 1946 he was, at the time of his death, the world's longest-serving head of state, the longest-reigning monarch in Thai history and the longest-serving monarch having reigned only as an adult, serving for 70 years, 126 days.
i don't know