Heptasexagesimal is a number system where the base is 67 and 101, 103, 107 and 109 are full repetend prime numbers. Full Repetend Prime Numbers: 5, 13, 19, 23, 41, 47, 53, 59, 61, 71, 83, 101, 103, 107, 109, 113, 127, 131, 137, 163, 167, 197, 223, 227, 229, 233, 263, 307, 313, 337, 359, 401, 409, 419, 431, 439
