204066660402 has 96 divisors (see below), whose sum is σ = 496059071040. Its totient is φ = 60084063360.

The previous prime is 204066660373. The next prime is 204066660403.

204066660402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (204066660403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5395068 + ... + 5432760.

It is an arithmetic number, because the mean of its divisors is an integer number (5167281990).

Almost surely, 2^204066660402 is an apocalyptic number.

204066660402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 204066660402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248029535520).

204066660402 is an abundant number, since it is smaller than the sum of its proper divisors (291992410638).

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

204066660402 is a wasteful number, since it uses less digits than its factorization.

204066660402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38488 (or 38485 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

It can be divided in two parts, 204066 and 660402, that added together give a palindrome (864468).

The spelling of 204066660402 in words is "two hundred four billion, sixty-six million, six hundred sixty thousand, four hundred two".