16666661060656 has 20 divisors (see below), whose sum is σ = 32624559476152. Its totient is φ = 8247419905536.

The previous prime is 16666661060639. The next prime is 16666661060659. The reversal of 16666661060656 is 65606016666661.

It is a super-2 number, since 2×16666661060656² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16666661060594 and 16666661060603.

It is not an unprimeable number, because it can be changed into a prime (16666661060659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5369412450 + ... + 5369415553.

Almost surely, 2^{16666661060656} is an apocalyptic number.

16666661060656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16666661060656 is a deficient number, since it is larger than the sum of its proper divisors (15957898415496).

16666661060656 is a wasteful number, since it uses less digits than its factorization.

16666661060656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738828108 (or 10738828102 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 16666661060656 in words is "sixteen trillion, six hundred sixty-six billion, six hundred sixty-one million, sixty thousand, six hundred fifty-six".