204660666642 has 32 divisors (see below), whose sum is σ = 428819650560. Its totient is φ = 64994138000.

The previous prime is 204660666611. The next prime is 204660666647. The reversal of 204660666642 is 246666066402.

It is a junction number, because it is equal to n+sod(n) for n = 204660666591 and 204660666600.

It is not an unprimeable number, because it can be changed into a prime (204660666647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2919642 + ... + 2988917.

It is an arithmetic number, because the mean of its divisors is an integer number (13400614080).

Almost surely, 2^204660666642 is an apocalyptic number.

204660666642 is an abundant number, since it is smaller than the sum of its proper divisors (224158983918).

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

204660666642 is a wasteful number, since it uses less digits than its factorization.

204660666642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908838.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 204660666642 in words is "two hundred four billion, six hundred sixty million, six hundred sixty-six thousand, six hundred forty-two".