166444146 has 160 divisors (see below), whose sum is σ = 441593856. Its totient is φ = 46332000.

The previous prime is 166444121. The next prime is 166444183. The reversal of 166444146 is 641444661.

166444146 is a `hidden beast` number, since 1 + 6 + 644 + 4 + 1 + 4 + 6 = 666.

It is a super-3 number, since 3×166444146³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166444146.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 1270501 + ... + 1270631.

Almost surely, 2^166444146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166444146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220796928).

166444146 is an abundant number, since it is smaller than the sum of its proper divisors (275149710).

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

166444146 is a wasteful number, since it uses less digits than its factorization.

166444146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 166444146 is about 12901.3234204868. The cubic root of 166444146 is about 550.0761833863.

The spelling of 166444146 in words is "one hundred sixty-six million, four hundred forty-four thousand, one hundred forty-six".