220404020866 has 8 divisors (see below), whose sum is σ = 338669593164. Its totient is φ = 107514156480.

The previous prime is 220404020857. The next prime is 220404020867. The reversal of 220404020866 is 668020404022.

It can be written as a sum of positive squares in 2 ways, for example, as 204896549025 + 15507471841 = 452655^2 + 124529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (220404020867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343926875 + ... + 1343927038.

Almost surely, 2^220404020866 is an apocalyptic number.

220404020866 is a deficient number, since it is larger than the sum of its proper divisors (118265572298).

220404020866 is a wasteful number, since it uses less digits than its factorization.

220404020866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687853956.

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 220404020866 its reverse (668020404022), we get a palindrome (888424424888).

The spelling of 220404020866 in words is "two hundred twenty billion, four hundred four million, twenty thousand, eight hundred sixty-six".