If k is an integer and (0.0025)(0.025)(0.00016) × 10expk x (0.008) x (0,00625) x (0,4) is an integer, what is the least possible value of k?

If k is an integer and (0.0025)(0.025)(0.00016) × 10expk x (0.008) x (0,00625) x (0,4) is an integer, what is the least possible value of k?

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