16668351838 has 8 divisors (see below), whose sum is σ = 25128169200. Its totient is φ = 8292295440.

The previous prime is 16668351797. The next prime is 16668351841. The reversal of 16668351838 is 83815386661.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20939743 + ... + 20940538.

It is an arithmetic number, because the mean of its divisors is an integer number (3141021150).

Almost surely, 2^16668351838 is an apocalyptic number.

16668351838 is a deficient number, since it is larger than the sum of its proper divisors (8459817362).

16668351838 is a wasteful number, since it uses less digits than its factorization.

16668351838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41880482.

The product of its digits is 4976640, while the sum is 55.

The spelling of 16668351838 in words is "sixteen billion, six hundred sixty-eight million, three hundred fifty-one thousand, eight hundred thirty-eight".