To rewrite the expression \((8^{10})^7\) as a single power, you can use the power of a power property of exponents, which states that \((a^m)^n = a^{m \cdot n}\).
Applying this property:
\[ (8^{10})^7 = 8^{10 \cdot 7} \]
Now calculate the exponent:
\[ 10 \cdot 7 = 70 \]
So the expression simplifies to:
\[ (8^{10})^7 = 8^{70} \]
Thus, the final answer is:
\[ 8^{70} \]