166858144 has 24 divisors (see below), whose sum is σ = 333006660. Its totient is φ = 82285056.

The previous prime is 166858129. The next prime is 166858147. The reversal of 166858144 is 441858661.

It can be written as a sum of positive squares in 2 ways, for example, as 153462544 + 13395600 = 12388^2 + 3660^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166858144.

It is not an unprimeable number, because it can be changed into a prime (166858147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33379 + ... + 38050.

Almost surely, 2^166858144 is an apocalyptic number.

It is an amenable number.

166858144 is a deficient number, since it is larger than the sum of its proper divisors (166148516).

166858144 is an equidigital number, since it uses as much as digits as its factorization.

166858144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71512 (or 71504 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 166858144 is about 12917.3582438516. The cubic root of 166858144 is about 550.5318755684.

The spelling of 166858144 in words is "one hundred sixty-six million, eight hundred fifty-eight thousand, one hundred forty-four".