205064660 has 12 divisors (see below), whose sum is σ = 430635828. Its totient is φ = 82025856.

The previous prime is 205064653. The next prime is 205064681. The reversal of 205064660 is 66460502.

It can be written as a sum of positive squares in 2 ways, for example, as 77193796 + 127870864 = 8786^2 + 11308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5126597 + ... + 5126636.

It is an arithmetic number, because the mean of its divisors is an integer number (35886319).

Almost surely, 2^205064660 is an apocalyptic number.

205064660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205064660 is an abundant number, since it is smaller than the sum of its proper divisors (225571168).

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

205064660 is a wasteful number, since it uses less digits than its factorization.

205064660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253242 (or 10253240 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 205064660 is about 14320.0789103971. The cubic root of 205064660 is about 589.6988408445.

The spelling of 205064660 in words is "two hundred five million, sixty-four thousand, six hundred sixty".