166858226 has 8 divisors (see below), whose sum is σ = 251142444. Its totient is φ = 83144080.

The previous prime is 166858201. The next prime is 166858229. The reversal of 166858226 is 622858661.

It can be written as a sum of positive squares in 2 ways, for example, as 123232201 + 43626025 = 11101^2 + 6605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166858229) 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, 141785 + ... + 142956.

Almost surely, 2^166858226 is an apocalyptic number.

166858226 is a deficient number, since it is larger than the sum of its proper divisors (84284218).

166858226 is a wasteful number, since it uses less digits than its factorization.

166858226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285036.

The product of its digits is 276480, while the sum is 44.

The square root of 166858226 is about 12917.3614178748. The cubic root of 166858226 is about 550.5319657520.

The spelling of 166858226 in words is "one hundred sixty-six million, eight hundred fifty-eight thousand, two hundred twenty-six".