10661116644 has 72 divisors (see below), whose sum is σ = 28405348608. Its totient is φ = 3495428640.

The previous prime is 10661116637. The next prime is 10661116649. The reversal of 10661116644 is 44661116601.

10661116644 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 1 + 1 + 1 + 6 + 644 = 666.

It is a super-2 number, since 2×10661116644² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 10661116599 and 10661116608.

It is not an unprimeable number, because it can be changed into a prime (10661116649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30612 + ... + 149195.

Almost surely, 2^10661116644 is an apocalyptic number.

It is an amenable number.

10661116644 is an abundant number, since it is smaller than the sum of its proper divisors (17744231964).

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

10661116644 is a wasteful number, since it uses less digits than its factorization.

10661116644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179887 (or 179873 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 10661116644 in words is "ten billion, six hundred sixty-one million, one hundred sixteen thousand, six hundred forty-four".