You can visit the coordinates above and see a 65, but you won’t find the cache there.
Instead go to:
S 307008007064 12500072161019 911004581116668
E 161555535062735 90241599668 364412500072161019
I recommend you decipher one number (e.g. 307008007064) at a time.
P.S. After talking to the FTF and 2TF I have increased the D rating and added an extra hint.