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seven77Number Seventy Seven Negative Properties. 77 is a Perfect Square or Not?. 77 is not a perfect square number . 77 is a Perfect Cube or Not?. 77 is not a perfect cube number . Is the numberI'm launching my first brand Seven77 (@seven77.mp4 ) this week! I've been working on this for over a year now and I'm so excited to be sharing this with