166275128 has 16 divisors (see below), whose sum is σ = 312090000. Its totient is φ = 83051136.

The previous prime is 166275127. The next prime is 166275133. The reversal of 166275128 is 821572661.

It is a junction number, because it is equal to n+sod(n) for n = 166275091 and 166275100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166275127) 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, 2228 + ... + 18371.

It is an arithmetic number, because the mean of its divisors is an integer number (19505625).

Almost surely, 2^166275128 is an apocalyptic number.

It is an amenable number.

166275128 is a deficient number, since it is larger than the sum of its proper divisors (145814872).

166275128 is a wasteful number, since it uses less digits than its factorization.

166275128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21614 (or 21610 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 166275128 is about 12894.7713434555. The cubic root of 166275128 is about 549.8899261813.

The spelling of 166275128 in words is "one hundred sixty-six million, two hundred seventy-five thousand, one hundred twenty-eight".