17666668422 has 96 divisors (see below), whose sum is σ = 42897254400. Its totient is φ = 5219315136.

The previous prime is 17666668421. The next prime is 17666668463. The reversal of 17666668422 is 22486666671.

It is a super-2 number, since 2×17666668422² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17666668421) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 578779 + ... + 608537.

It is an arithmetic number, because the mean of its divisors is an integer number (446846400).

Almost surely, 2^17666668422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17666668422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21448627200).

17666668422 is an abundant number, since it is smaller than the sum of its proper divisors (25230585978).

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

17666668422 is a wasteful number, since it uses less digits than its factorization.

17666668422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882 (or 29879 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 17666668422 in words is "seventeen billion, six hundred sixty-six million, six hundred sixty-eight thousand, four hundred twenty-two".