28566166 has 4 divisors (see below), whose sum is σ = 42849252. Its totient is φ = 14283082.

The previous prime is 28566157. The next prime is 28566173. The reversal of 28566166 is 66166582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7141540 + ... + 7141543.

It is an arithmetic number, because the mean of its divisors is an integer number (10712313).

Almost surely, 2^28566166 is an apocalyptic number.

28566166 is a deficient number, since it is larger than the sum of its proper divisors (14283086).

28566166 is a wasteful number, since it uses less digits than its factorization.

28566166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14283085.

The product of its digits is 103680, while the sum is 40.

The square root of 28566166 is about 5344.7325470972. The cubic root of 28566166 is about 305.6919379619.

The spelling of 28566166 in words is "twenty-eight million, five hundred sixty-six thousand, one hundred sixty-six".