10661116656 has 40 divisors (see below), whose sum is σ = 28285579984. Its totient is φ = 3457658880.

The previous prime is 10661116651. The next prime is 10661116667. The reversal of 10661116656 is 65661116601.

It is a super-2 number, since 2×10661116656² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661116651) 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, 2999665 + ... + 3003216.

Almost surely, 2^10661116656 is an apocalyptic number.

10661116656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10661116656 is an abundant number, since it is smaller than the sum of its proper divisors (17624463328).

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

10661116656 is a wasteful number, since it uses less digits than its factorization.

10661116656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002929 (or 6002923 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

Subtracting 10661116656 from its reverse (65661116601), we obtain a palindrome (54999999945).

The spelling of 10661116656 in words is "ten billion, six hundred sixty-one million, one hundred sixteen thousand, six hundred fifty-six".