66805422192 has 160 divisors (see below), whose sum is σ = 202113403200. Its totient is φ = 21094714368.

The previous prime is 66805422191. The next prime is 66805422227. The reversal of 66805422192 is 29122450866.

66805422192 is a `hidden beast` number, since 6 + 6 + 80 + 542 + 21 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66805422191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 613678 + ... + 714290.

It is an arithmetic number, because the mean of its divisors is an integer number (1263208770).

Almost surely, 2^66805422192 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 66805422192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101056701600).

66805422192 is an abundant number, since it is smaller than the sum of its proper divisors (135307981008).

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

66805422192 is a wasteful number, since it uses less digits than its factorization.

66805422192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100712 (or 100700 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 66805422192 in words is "sixty-six billion, eight hundred five million, four hundred twenty-two thousand, one hundred ninety-two".