16668516850000 has 60 divisors (see below), whose sum is σ = 40366480747068. Its totient is φ = 6667406720000.

The previous prime is 16668516849967. The next prime is 16668516850003. The reversal of 16668516850000 is 5861586661.

It can be written as a sum of positive squares in 6 ways, for example, as 9741240241216 + 6927276608784 = 3121096^2 + 2631972^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16668516850000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668516850003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166635169 + ... + 166735168.

Almost surely, 2^{16668516850000} is an apocalyptic number.

16668516850000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16668516850000 is an abundant number, since it is smaller than the sum of its proper divisors (23697963897068).

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

16668516850000 is an frugal number, since it uses more digits than its factorization.

16668516850000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333370370 (or 333370344 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 16668516850000 in words is "sixteen trillion, six hundred sixty-eight billion, five hundred sixteen million, eight hundred fifty thousand".