128266166 has 8 divisors (see below), whose sum is σ = 219884880. Its totient is φ = 54971208.

The previous prime is 128266157. The next prime is 128266199. The reversal of 128266166 is 661662821.

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

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 3 ways as a sum of consecutive naturals, for example, 4580921 + ... + 4580948.

It is an arithmetic number, because the mean of its divisors is an integer number (27485610).

Almost surely, 2^128266166 is an apocalyptic number.

128266166 is a deficient number, since it is larger than the sum of its proper divisors (91618714).

128266166 is an equidigital number, since it uses as much as digits as its factorization.

128266166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161878.

The product of its digits is 41472, while the sum is 38.

The square root of 128266166 is about 11325.4653767516. The cubic root of 128266166 is about 504.3174990943.

The spelling of 128266166 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, one hundred sixty-six".