16599965005980 has 120 divisors (see below), whose sum is σ = 52075818915120. Its totient is φ = 4426562649600.

The previous prime is 16599965005979. The next prime is 16599965006021. The reversal of 16599965005980 is 8950056999561.

It is a happy number.

16599965005980 is a `hidden beast` number, since 1 + 65 + 9 + 9 + 9 + 6 + 500 + 59 + 8 + 0 = 666.

16599965005980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16599965005899 and 16599965005908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 109437831 + ... + 109589409.

It is an arithmetic number, because the mean of its divisors is an integer number (433965157626).

Almost surely, 2^{16599965005980} is an apocalyptic number.

16599965005980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16599965005980 is an abundant number, since it is smaller than the sum of its proper divisors (35475853909140).

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

16599965005980 is a wasteful number, since it uses less digits than its factorization.

16599965005980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219201 (or 219190 counting only the distinct ones).

The product of its (nonzero) digits is 236196000, while the sum is 72.

The spelling of 16599965005980 in words is "sixteen trillion, five hundred ninety-nine billion, nine hundred sixty-five million, five thousand, nine hundred eighty".