66322117312 has 84 divisors (see below), whose sum is σ = 147390325488. Its totient is φ = 29577433600.

The previous prime is 66322117261. The next prime is 66322117339. The reversal of 66322117312 is 21371122366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329637 + ... + 491227.

It is an arithmetic number, because the mean of its divisors is an integer number (1754646732).

Almost surely, 2^66322117312 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 66322117312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73695162744).

66322117312 is an abundant number, since it is smaller than the sum of its proper divisors (81068208176).

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

66322117312 is a wasteful number, since it uses less digits than its factorization.

66322117312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161678 (or 161657 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

Adding to 66322117312 its reverse (21371122366), we get a palindrome (87693239678).

The spelling of 66322117312 in words is "sixty-six billion, three hundred twenty-two million, one hundred seventeen thousand, three hundred twelve".