16660684216 has 64 divisors (see below), whose sum is σ = 36104940000. Its totient is φ = 7123292160.

The previous prime is 16660684213. The next prime is 16660684217. The reversal of 16660684216 is 61248606661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660684213) 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 15 ways as a sum of consecutive naturals, for example, 4828860 + ... + 4832308.

Almost surely, 2^16660684216 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 16660684216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18052470000).

16660684216 is an abundant number, since it is smaller than the sum of its proper divisors (19444255784).

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

16660684216 is a wasteful number, since it uses less digits than its factorization.

16660684216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712 (or 6708 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 16660684216 in words is "sixteen billion, six hundred sixty million, six hundred eighty-four thousand, two hundred sixteen".