No.
670
23% of 670 = 23% * 670 = 0.23 * 670 = 154.1
80% of 670 = 80% * 670 = 0.8 * 670 = 536
An easy way to test if a number is divisible by 4 is to divide the last two digits by 2. If the result is even then the number is divisible by 4. In this case, dividing each number by 2 gives 14, 28.5, 40, 81, 8, 28, 40 and 35. The only numbers which weren't even after dividing by two were 57, 162 and 670. Thus all the other numbers are divisible by four: 28, 80, 216, 356 and 480.
670 meters equals 670 meters.
670.
670
0.0134
670 is ten times bigger than 67.
Half of 670 is 335.
670 is not Perfect.