166878324 has 72 divisors (see below), whose sum is σ = 448805448. Its totient is φ = 52101120.

The previous prime is 166878319. The next prime is 166878343. The reversal of 166878324 is 423878661.

It can be written as a sum of positive squares in 4 ways, for example, as 110628324 + 56250000 = 10518^2 + 7500^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166878324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156754 + ... + 157814.

It is an arithmetic number, because the mean of its divisors is an integer number (6233409).

Almost surely, 2^166878324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166878324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224402724).

166878324 is an abundant number, since it is smaller than the sum of its proper divisors (281927124).

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

166878324 is a wasteful number, since it uses less digits than its factorization.

166878324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1340 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 166878324 is about 12918.1393397037. The cubic root of 166878324 is about 550.5540686424.

The spelling of 166878324 in words is "one hundred sixty-six million, eight hundred seventy-eight thousand, three hundred twenty-four".