204140661 has 8 divisors (see below), whose sum is σ = 275633280. Its totient is φ = 134370912.

The previous prime is 204140653. The next prime is 204140687. The reversal of 204140661 is 166041402.

204140661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 204140661 - 2³ = 204140653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204140561) 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, 430440 + ... + 430913.

It is an arithmetic number, because the mean of its divisors is an integer number (34454160).

Almost surely, 2^204140661 is an apocalyptic number.

It is an amenable number.

204140661 is a deficient number, since it is larger than the sum of its proper divisors (71492619).

204140661 is an equidigital number, since it uses as much as digits as its factorization.

204140661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861435.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 204140661 is about 14287.7801284874. The cubic root of 204140661 is about 588.8118009782.

The spelling of 204140661 in words is "two hundred four million, one hundred forty thousand, six hundred sixty-one".