A nanometer is a small length, and one nm would be the smallest integer length. But picometers and smaller sub-multiples. (femto-, atto-, etc) are even smaller in length.
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That would be a nanometer.
1 nanometer=1.0510-9
Nanometer is definitely smaller then a meter.
the smallest perfect number is 1
no 0 isn't the smallest number because there are negative numbers so there really is no biggest number nor smallest number