166859183428 has 48 divisors (see below), whose sum is σ = 355928186880. Its totient is φ = 66813244416.

The previous prime is 166859183419. The next prime is 166859183443. The reversal of 166859183428 is 824381958661.

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 15 ways as a sum of consecutive naturals, for example, 1214148 + ... + 1344571.

It is an arithmetic number, because the mean of its divisors is an integer number (7415170560).

Almost surely, 2^166859183428 is an apocalyptic number.

It is an amenable number.

166859183428 is an abundant number, since it is smaller than the sum of its proper divisors (189069003452).

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

166859183428 is a wasteful number, since it uses less digits than its factorization.

166859183428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558884 (or 2558882 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 61.

The spelling of 166859183428 in words is "one hundred sixty-six billion, eight hundred fifty-nine million, one hundred eighty-three thousand, four hundred twenty-eight".