10665661056 has 64 divisors (see below), whose sum is σ = 28357036320. Its totient is φ = 3551910912.

The previous prime is 10665661051. The next prime is 10665661063. The reversal of 10665661056 is 65016656601.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×10665661056² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10665660999 and 10665661017.

It is not an unprimeable number, because it can be changed into a prime (10665661051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418866 + ... + 443598.

Almost surely, 2^10665661056 is an apocalyptic number.

10665661056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10665661056 is an abundant number, since it is smaller than the sum of its proper divisors (17691375264).

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

10665661056 is a wasteful number, since it uses less digits than its factorization.

10665661056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25873 (or 25861 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 10665661056 in words is "ten billion, six hundred sixty-five million, six hundred sixty-one thousand, fifty-six".