This is clearly a group of scammers representing themselves as Apple support.
I received a call from this number with a very pleasant sounding text-to-speech voice claiming to be with Apple support, and claiming they'd noticed some suspicious activity on my iCloud account. This seemed plausible to me as I recently removed all of my photos from iCloud.
I pressed the number after the recorded message to speak to support and asked them who they were and why they were calling me -- They again claimed to be representatives from Apple support. When I asked how I could verify this, they immediately hung up on me.