66797914222512 has 240 divisors, whose sum is σ = 211252822704000. Its totient is φ = 20193475800960.

The previous prime is 66797914222489. The next prime is 66797914222573. The reversal of 66797914222512 is 21522241979766.

It is a happy number.

66797914222512 is a `hidden beast` number, since 6 + 6 + 7 + 9 + 7 + 91 + 4 + 2 + 22 + 512 = 666.

It is a super-2 number, since 2×66797914222512² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66797914222512.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20377039 + ... + 23426897.

It is an arithmetic number, because the mean of its divisors is an integer number (880220094600).

Almost surely, 2^{66797914222512} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66797914222512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105626411352000).

66797914222512 is an abundant number, since it is smaller than the sum of its proper divisors (144454908481488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66797914222512 is a wasteful number, since it uses less digits than its factorization.

66797914222512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050317 (or 3050294 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 66797914222512 in words is "sixty-six trillion, seven hundred ninety-seven billion, nine hundred fourteen million, two hundred twenty-two thousand, five hundred twelve".