8642 is the greatist number if all the numbers are not the same and even
9
9,999,876 is the greatest seven-digit number using four different digits.
greatest number9999987
98765.
98
987654
9,999,876 is the greatest seven-digit number using four different digits.
greatest number9999987
8642
9,876,543 is.
98765.
98
987654
That would be 99987.
9876 and 1234
999987
99,999,876
99,999,987