Evaluate
2\sqrt{16721897}\approx 8178.483233461
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2\sqrt{16721897}
Factor 66887588=2^{2}\times 16721897. Rewrite the square root of the product \sqrt{2^{2}\times 16721897} as the product of square roots \sqrt{2^{2}}\sqrt{16721897}. Take the square root of 2^{2}.
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