204225666 has 16 divisors (see below), whose sum is σ = 409533600. Its totient is φ = 67894848.

The previous prime is 204225649. The next prime is 204225667. The reversal of 204225666 is 666522402.

It is not an unprimeable number, because it can be changed into a prime (204225667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42631 + ... + 47178.

It is an arithmetic number, because the mean of its divisors is an integer number (25595850).

Almost surely, 2^204225666 is an apocalyptic number.

204225666 is an abundant number, since it is smaller than the sum of its proper divisors (205307934).

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

204225666 is a wasteful number, since it uses less digits than its factorization.

204225666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90193.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 204225666 is about 14290.7545637031. The cubic root of 204225666 is about 588.8935175117.

The spelling of 204225666 in words is "two hundred four million, two hundred twenty-five thousand, six hundred sixty-six".