6722216171660 has 96 divisors (see below), whose sum is σ = 16212330489600. Its totient is φ = 2315527568640.

The previous prime is 6722216171609. The next prime is 6722216171669. The reversal of 6722216171660 is 661716122276.

It is not an unprimeable number, because it can be changed into a prime (6722216171669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39219026 + ... + 39390054.

It is an arithmetic number, because the mean of its divisors is an integer number (168878442600).

Almost surely, 2^{6722216171660} 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 6722216171660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8106165244800).

6722216171660 is an abundant number, since it is smaller than the sum of its proper divisors (9490114317940).

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

6722216171660 is a wasteful number, since it uses less digits than its factorization.

6722216171660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180471 (or 180469 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 6722216171660 in words is "six trillion, seven hundred twenty-two billion, two hundred sixteen million, one hundred seventy-one thousand, six hundred sixty".