10661116646 has 4 divisors (see below), whose sum is σ = 15991674972. Its totient is φ = 5330558322.

The previous prime is 10661116637. The next prime is 10661116649. The reversal of 10661116646 is 64661116601.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×10661116646² (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 (10661116649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665279160 + ... + 2665279163.

It is an arithmetic number, because the mean of its divisors is an integer number (3997918743).

Almost surely, 2^10661116646 is an apocalyptic number.

10661116646 is a deficient number, since it is larger than the sum of its proper divisors (5330558326).

10661116646 is an equidigital number, since it uses as much as digits as its factorization.

10661116646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330558325.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 10661116646 in words is "ten billion, six hundred sixty-one million, one hundred sixteen thousand, six hundred forty-six".