16659640773776 has 480 divisors, whose sum is σ = 44880892939008. Its totient is φ = 5785344000000.

The previous prime is 16659640773767. The next prime is 16659640773821. The reversal of 16659640773776 is 67737704695661.

It is a super-2 number, since 2×16659640773776² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9250216076 + ... + 9250217876.

Almost surely, 2^{16659640773776} is an apocalyptic number.

16659640773776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16659640773776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22440446469504).

16659640773776 is an abundant number, since it is smaller than the sum of its proper divisors (28221252165232).

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

16659640773776 is a wasteful number, since it uses less digits than its factorization.

16659640773776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503 (or 2466 counting only the distinct ones).

The product of its (nonzero) digits is 1680315840, while the sum is 74.

The spelling of 16659640773776 in words is "sixteen trillion, six hundred fifty-nine billion, six hundred forty million, seven hundred seventy-three thousand, seven hundred seventy-six".