204586661 has 8 divisors (see below), whose sum is σ = 218305920. Its totient is φ = 191162592.

The previous prime is 204586601. The next prime is 204586663. The reversal of 204586661 is 166685402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204586661 - 2¹⁰ = 204585637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204586663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72365 + ... + 75138.

It is an arithmetic number, because the mean of its divisors is an integer number (27288240).

Almost surely, 2^204586661 is an apocalyptic number.

It is an amenable number.

204586661 is a deficient number, since it is larger than the sum of its proper divisors (13719259).

204586661 is a wasteful number, since it uses less digits than its factorization.

204586661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147595.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 204586661 is about 14303.3793559424. The cubic root of 204586661 is about 589.2402948190.

The spelling of 204586661 in words is "two hundred four million, five hundred eighty-six thousand, six hundred sixty-one".