220404666512 has 20 divisors (see below), whose sum is σ = 440809334016. Its totient is φ = 106647419040.

The previous prime is 220404666499. The next prime is 220404666539. The reversal of 220404666512 is 215666404022.

220404666512 is an admirable number.

It is a super-2 number, since 2×220404666512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222181628 + ... + 222182619.

Almost surely, 2^220404666512 is an apocalyptic number.

It is an amenable number.

220404666512 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220404666512 is a wasteful number, since it uses less digits than its factorization.

220404666512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444364286 (or 444364280 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 220404666512 in words is "two hundred twenty billion, four hundred four million, six hundred sixty-six thousand, five hundred twelve".