285666666 has 16 divisors (see below), whose sum is σ = 579160704. Its totient is φ = 93917664.

The previous prime is 285666631. The next prime is 285666697. The reversal of 285666666 is 666666582.

285666666 is a modest number, since divided by 66666 gives 2856 as remainder.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325666 + ... + 326541.

It is an arithmetic number, because the mean of its divisors is an integer number (36197544).

Almost surely, 2^285666666 is an apocalyptic number.

285666666 is an abundant number, since it is smaller than the sum of its proper divisors (293494038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285666666 is a wasteful number, since it uses less digits than its factorization.

285666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652285.

The product of its digits is 3732480, while the sum is 51.

The square root of 285666666 is about 16901.6764257277. The cubic root of 285666666 is about 658.5971626988.

The spelling of 285666666 in words is "two hundred eighty-five million, six hundred sixty-six thousand, six hundred sixty-six".