205041660 has 24 divisors (see below), whose sum is σ = 574116816. Its totient is φ = 54677760.

The previous prime is 205041647. The next prime is 205041667. The reversal of 205041660 is 66140502.

It is a self number, because there is not a number n which added to its sum of digits gives 205041660.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708621 + ... + 1708740.

It is an arithmetic number, because the mean of its divisors is an integer number (23921534).

Almost surely, 2^205041660 is an apocalyptic number.

205041660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205041660 is an abundant number, since it is smaller than the sum of its proper divisors (369075156).

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

205041660 is a wasteful number, since it uses less digits than its factorization.

205041660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417373 (or 3417371 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205041660 is about 14319.2758196775. The cubic root of 205041660 is about 589.6767931963.

The spelling of 205041660 in words is "two hundred five million, forty-one thousand, six hundred sixty".