225566566 has 16 divisors (see below), whose sum is σ = 355186944. Its totient is φ = 107230024.

The previous prime is 225566531. The next prime is 225566581. The reversal of 225566566 is 665665522.

It is a congruent 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, 7000 + ... + 22363.

It is an arithmetic number, because the mean of its divisors is an integer number (22199184).

Almost surely, 2^225566566 is an apocalyptic number.

225566566 is a deficient number, since it is larger than the sum of its proper divisors (129620378).

225566566 is a wasteful number, since it uses less digits than its factorization.

225566566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29555.

The product of its digits is 648000, while the sum is 43.

The square root of 225566566 is about 15018.8736594992. The cubic root of 225566566 is about 608.7302855569.

The spelling of 225566566 in words is "two hundred twenty-five million, five hundred sixty-six thousand, five hundred sixty-six".