225680666 has 16 divisors (see below), whose sum is σ = 340787304. Its totient is φ = 112088064.

The previous prime is 225680659. The next prime is 225680701. The reversal of 225680666 is 666086522.

It can be written as a sum of positive squares in 4 ways, for example, as 219780625 + 5900041 = 14825^2 + 2429^2 .

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, 262910 + ... + 263766.

Almost surely, 2^225680666 is an apocalyptic number.

225680666 is a deficient number, since it is larger than the sum of its proper divisors (115106638).

225680666 is a wasteful number, since it uses less digits than its factorization.

225680666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 225680666 is about 15022.6717330840. The cubic root of 225680666 is about 608.8329077657.

The spelling of 225680666 in words is "two hundred twenty-five million, six hundred eighty thousand, six hundred sixty-six".