what is 8 to the power of 67 called 8x10^67
They are two different numbers.
$${{\mathtt{8}}}^{{\mathtt{67}}} = {\mathtt{3\,213\,876\,088\,517\,980\,551\,083\,924\,184\,682\,325\,205\,044\,405\,987\,565\,585\,670\,602\,752}}$$
$${\mathtt{8\times 10^{67}}}$$ equals 8 with 67 zeros after it.