10661006643 has 32 divisors (see below), whose sum is σ = 16382438400. Its totient is φ = 6040742400.

The previous prime is 10661006623. The next prime is 10661006677. The reversal of 10661006643 is 34660016601.

It is not a de Polignac number, because 10661006643 - 2⁸ = 10661006387 is a prime.

It is a super-2 number, since 2×10661006643² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661006623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1953783 + ... + 1959231.

It is an arithmetic number, because the mean of its divisors is an integer number (511951200).

Almost surely, 2^10661006643 is an apocalyptic number.

10661006643 is a deficient number, since it is larger than the sum of its proper divisors (5721431757).

10661006643 is a wasteful number, since it uses less digits than its factorization.

10661006643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 10661006643 in words is "ten billion, six hundred sixty-one million, six thousand, six hundred forty-three".