204656680 has 16 divisors (see below), whose sum is σ = 460477620. Its totient is φ = 81862656.

The previous prime is 204656677. The next prime is 204656687. The reversal of 204656680 is 86656402.

204656680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 199430884 + 5225796 = 14122^2 + 2286^2 .

It is not an unprimeable number, because it can be changed into a prime (204656687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558169 + ... + 2558248.

Almost surely, 2^204656680 is an apocalyptic number.

204656680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204656680 is an abundant number, since it is smaller than the sum of its proper divisors (255820940).

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

204656680 is a wasteful number, since it uses less digits than its factorization.

204656680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116428 (or 5116424 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 204656680 is about 14305.8267849153. The cubic root of 204656680 is about 589.3075088953.

The spelling of 204656680 in words is "two hundred four million, six hundred fifty-six thousand, six hundred eighty".