28366666 has 8 divisors (see below), whose sum is σ = 42612804. Its totient is φ = 14162400.

The previous prime is 28366651. The next prime is 28366673. The reversal of 28366666 is 66666382.

It can be written as a sum of positive squares in 2 ways, for example, as 27092025 + 1274641 = 5205^2 + 1129^2 .

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

28366666 is a modest number, since divided by 6666 gives 2836 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8715 + ... + 11518.

Almost surely, 2^28366666 is an apocalyptic number.

28366666 is a deficient number, since it is larger than the sum of its proper divisors (14246138).

28366666 is a wasteful number, since it uses less digits than its factorization.

28366666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20936.

The product of its digits is 373248, while the sum is 43.

The square root of 28366666 is about 5326.0366127168. The cubic root of 28366666 is about 304.9786458220.

The spelling of 28366666 in words is "twenty-eight million, three hundred sixty-six thousand, six hundred sixty-six".