If, by 'least number', the questioner means 'smallest digit', then the answer is 0.
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805 is a Composite Number.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. 805 is an odd number.
3 significant figures.
5 times 805
805 = 5×161 805 = 5×161 (5). 1611 805 = 805 ^ (5). 1611 161= 7×23 Therefore 805 = 5×7×23Therefore 805 = 5×7×23