205041663 has 6 divisors (see below), whose sum is σ = 296171304. Its totient is φ = 136694436.

The previous prime is 205041647. The next prime is 205041667. The reversal of 205041663 is 366140502.

It is not a de Polignac number, because 205041663 - 2⁴ = 205041647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205041667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11391195 + ... + 11391212.

It is an arithmetic number, because the mean of its divisors is an integer number (49361884).

Almost surely, 2^205041663 is an apocalyptic number.

205041663 is a deficient number, since it is larger than the sum of its proper divisors (91129641).

205041663 is a wasteful number, since it uses less digits than its factorization.

205041663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22782413 (or 22782410 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 205041663 is about 14319.2759244314. The cubic root of 205041663 is about 589.6767960722.

The spelling of 205041663 in words is "two hundred five million, forty-one thousand, six hundred sixty-three".