16866688138220 has 12 divisors (see below), whose sum is σ = 35420045090304. Its totient is φ = 6746675255280.

The previous prime is 16866688138121. The next prime is 16866688138297. The reversal of 16866688138220 is 2283188666861.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421667203436 + ... + 421667203475.

It is an arithmetic number, because the mean of its divisors is an integer number (2951670424192).

Almost surely, 2^{16866688138220} is an apocalyptic number.

16866688138220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16866688138220 is an abundant number, since it is smaller than the sum of its proper divisors (18553356952084).

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

16866688138220 is a wasteful number, since it uses less digits than its factorization.

16866688138220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843334406920 (or 843334406918 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 65.

The spelling of 16866688138220 in words is "sixteen trillion, eight hundred sixty-six billion, six hundred eighty-eight million, one hundred thirty-eight thousand, two hundred twenty".