180 (number) two square numbers: 12 + 6. It can be expressed as either the sum of six consecutive prime numbers: 19 + 23 + 29 + 31 + 37 + 41, or the sum of eight consecutive prime numbers: 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37. 180 is an Ulam number, which can be expressed as a sum of earlier terms in the Ulam sequence only as 177 + 3. 180 is a 61-gonal number. Half a circle has 180 degrees. Summing Euler's totient function φ("x") over the first + 24 integers gives
17-11-70 that album producer Gus Dudgeon remixed the tracks to create a notably different sound from the original US LP mixes. In addition to level changes, Dudgeon's version also added some echo and other effects not present in the earlier mixes, which has drawn mixed reactions from fans. The 2017 Record Store Day special reissue features the six remained-unreleased songs from the concert, plus "Amoreena" (featured on the 1996 CD). The track listing for the first two sides is the same as the original 1970 release. Note Production Album 17-11-70 17-11-70 (US title "11-17-70"), released in 1971, is the fifth official