A rational number is one that can be expressed as a ratio of two integers. In this case, 4.46466 is a decimal number and not a whole number. To determine if it is rational, we can check if it can be expressed as a fraction. If we convert 4.46466 to a fraction, we find that it can be expressed as 446466/100000, which simplifies to 223233/50000. Therefore, 4.46466 is a rational number.
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