166323423444 has 96 divisors (see below), whose sum is σ = 406918127616. Its totient is φ = 52812224640.

The previous prime is 166323423443. The next prime is 166323423449. The reversal of 166323423444 is 444324323661.

It is a super-2 number, since 2×166323423444² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 166323423396 and 166323423405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166323423443) 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 31 ways as a sum of consecutive naturals, for example, 8542929 + ... + 8562375.

It is an arithmetic number, because the mean of its divisors is an integer number (4238730496).

Almost surely, 2^166323423444 is an apocalyptic number.

It is an amenable number.

166323423444 is an abundant number, since it is smaller than the sum of its proper divisors (240594704172).

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

166323423444 is a wasteful number, since it uses less digits than its factorization.

166323423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19845 (or 19843 counting only the distinct ones).

The product of its digits is 995328, while the sum is 42.

The spelling of 166323423444 in words is "one hundred sixty-six billion, three hundred twenty-three million, four hundred twenty-three thousand, four hundred forty-four".