166666491732 has 96 divisors (see below), whose sum is σ = 428728706560. Its totient is φ = 50067642240.

The previous prime is 166666491683. The next prime is 166666491773. The reversal of 166666491732 is 237194666661.

166666491732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 22340619 + ... + 22348077.

Almost surely, 2^166666491732 is an apocalyptic number.

166666491732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166666491732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214364353280).

166666491732 is an abundant number, since it is smaller than the sum of its proper divisors (262062214828).

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

166666491732 is a wasteful number, since it uses less digits than its factorization.

166666491732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10853 (or 10851 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 57.

The spelling of 166666491732 in words is "one hundred sixty-six billion, six hundred sixty-six million, four hundred ninety-one thousand, seven hundred thirty-two".