Scholar using your literature, the dates the Kings Ruled.
Nabonidus: 17 Years
Labashi-Marduk: Less than 9 Months
Neriglissar - 4 Years
Evil-Merodach - 2 Years
2 yrs Nebuchadnezzar II 43 Years
ALL THESE DATES COME FROM WBT Society Literature.
Add the years of all these together...
66 Years and 9 Months. 539 + 66 Years = 605...
Odd that.