Belphegor's prime

The name "Belphegor's prime" was coined by author Clifford A. Pickover in 2012.

[1] Belphegor is one of the Seven Princes of Hell; specifically, "the demon of inventiveness".

[2] The number of zeroes required to create each of the first few Belphegor primes is:[3] Belphegor's prime contains 13 zeroes on either side of the central 666, and thus corresponds to the second number in this sequence.

In the short scale, this number would be named "one nonillion, sixty-six quadrillion, six hundred trillion one."

In the long scale, this number's name would be "one quintillion, sixty-six billiard, six hundred billion one."

Symbol of Belphegor's prime, represented by the Greek letter π upside down