16666607112220 has 48 divisors (see below), whose sum is σ = 39909359665728. Its totient is φ = 5791834506240.

The previous prime is 16666607112217. The next prime is 16666607112223. The reversal of 16666607112220 is 2221170666661.

It is an interprime number because it is at equal distance from previous prime (16666607112217) and next prime (16666607112223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666607112223) 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, 1885358376 + ... + 1885367215.

It is an arithmetic number, because the mean of its divisors is an integer number (831444993036).

Almost surely, 2^{16666607112220} is an apocalyptic number.

16666607112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16666607112220 is an abundant number, since it is smaller than the sum of its proper divisors (23242752553508).

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

16666607112220 is a wasteful number, since it uses less digits than its factorization.

16666607112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770725630 (or 3770725628 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

Adding to 16666607112220 its reverse (2221170666661), we get a palindrome (18887777778881).

The spelling of 16666607112220 in words is "sixteen trillion, six hundred sixty-six billion, six hundred seven million, one hundred twelve thousand, two hundred twenty".