16683665388 has 384 divisors, whose sum is σ = 48554311680. Its totient is φ = 4406814720.

The previous prime is 16683665387. The next prime is 16683665393. The reversal of 16683665388 is 88356638661.

It is not an unprimeable number, because it can be changed into a prime (16683665387) 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 127 ways as a sum of consecutive naturals, for example, 131367381 + ... + 131367507.

It is an arithmetic number, because the mean of its divisors is an integer number (126443520).

Almost surely, 2^16683665388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16683665388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24277155840).

16683665388 is an abundant number, since it is smaller than the sum of its proper divisors (31870646292).

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

16683665388 is a wasteful number, since it uses less digits than its factorization.

16683665388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 60.

The spelling of 16683665388 in words is "sixteen billion, six hundred eighty-three million, six hundred sixty-five thousand, three hundred eighty-eight".