666.66 hours is 666.66 hours long. It's 27.775 days, which is a little less than a month.
66666 66666 66666
66666 + 12211 = 78,877
It is not, for it is equal to 66666/1, which is the ratio of two integers.
66666
66666
6,060,539,394
66666
No, it is a single number.
66666
.66666
66666
It IS a real number.It's also rational.