There are 24 hours in a day. 66 x 24 = the hours in 66 days. 66 x 24 = 1584 hours.
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2.75486 days.
66 days and 12 hours.
There are: 528/8 = 66 working days
Just over two months - it's 66 days, 16 hours
A Mercury day (sidereal rotation period) is 58.646 earth days = 1407.5 hours.