The LM386 is Not simply an opamp.
It is a power amplifier in it's own right.
The quiescent current with a 12Vdc supply is in the milliwatts.
So that wont make you say ouch.
The power dissipation of the package is 500 milliwatts (1/2 watt).
Again, no need for a heatsink.
If the device got that hot, it is hooked up wrong.
Most probably it is now bad.
It is a power amplifier in it's own right.
The quiescent current with a 12Vdc supply is in the milliwatts.
So that wont make you say ouch.
The power dissipation of the package is 500 milliwatts (1/2 watt).
Again, no need for a heatsink.
If the device got that hot, it is hooked up wrong.
Most probably it is now bad.