Problem
What is the sixth root of $59604644775390625$ $\ ?$
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Solution
When $59604644775390625$ is factorized into prime factors, $$59604644775390625=5^{24}=(5^4)^6=625^6.$$ Therefore, we find that $$\sqrt[6]{59604644775390625}=625.$$
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$$Ans. \quad 625$$
Reference
Yoshikazu Yamakawa, ed. (1997) Okayama ken no Sangaku (Sangaku in Okayama Prefecture), p.53; p.295.