205164660 has 48 divisors (see below), whose sum is σ = 604699200. Its totient is φ = 51830784.

The previous prime is 205164649. The next prime is 205164691. The reversal of 205164660 is 66461502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88845 + ... + 91124.

It is an arithmetic number, because the mean of its divisors is an integer number (12597900).

Almost surely, 2^205164660 is an apocalyptic number.

205164660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205164660 is an abundant number, since it is smaller than the sum of its proper divisors (399534540).

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

205164660 is a wasteful number, since it uses less digits than its factorization.

205164660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180000 (or 179998 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 205164660 is about 14323.5700857014. The cubic root of 205164660 is about 589.7946810234.

The spelling of 205164660 in words is "two hundred five million, one hundred sixty-four thousand, six hundred sixty".