16661759735880 has 160 divisors (see below), whose sum is σ = 64002315263040. Its totient is φ = 3808402220160.

The previous prime is 16661759735851. The next prime is 16661759735963. The reversal of 16661759735880 is 8853795716661.

It is a super-2 number, since 2×16661759735880² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 16661759735799 and 16661759735808.

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, 367300066 + ... + 367345425.

It is an arithmetic number, because the mean of its divisors is an integer number (400014470394).

Almost surely, 2^{16661759735880} is an apocalyptic number.

16661759735880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16661759735880 is an abundant number, since it is smaller than the sum of its proper divisors (47340555527160).

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

16661759735880 is a wasteful number, since it uses less digits than its factorization.

16661759735880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734645521 (or 734645508 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 72.

The spelling of 16661759735880 in words is "sixteen trillion, six hundred sixty-one billion, seven hundred fifty-nine million, seven hundred thirty-five thousand, eight hundred eighty".