225664566 has 32 divisors (see below), whose sum is σ = 460961280. Its totient is φ = 73623264.

The previous prime is 225664561. The next prime is 225664589. The reversal of 225664566 is 665466522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225664561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216675 + ... + 217713.

It is an arithmetic number, because the mean of its divisors is an integer number (14405040).

Almost surely, 2^225664566 is an apocalyptic number.

225664566 is an abundant number, since it is smaller than the sum of its proper divisors (235296714).

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

225664566 is a wasteful number, since it uses less digits than its factorization.

225664566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its digits is 518400, while the sum is 42.

The square root of 225664566 is about 15022.1358667801. The cubic root of 225664566 is about 608.8184294277.

The spelling of 225664566 in words is "two hundred twenty-five million, six hundred sixty-four thousand, five hundred sixty-six".