122664345721920 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 6 + 4 + 34 + 572 + 19 + 20 = 666.
It is an unprimeable number.
Almost surely, 2122664345721920 is an apocalyptic number.
122664345721920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 122664345721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213875214799896).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
122664345721920 is a wasteful number, since it uses less digits than its factorization.
122664345721920 is an odious number, because the sum of its binary digits is odd.
The spelling of 122664345721920 in words is "one hundred twenty-two trillion, six hundred sixty-four billion, three hundred forty-five million, seven hundred twenty-one thousand, nine hundred twenty".