10666443643 has 2 divisors, whose sum is σ = 10666443644. Its totient is φ = 10666443642.

The previous prime is 10666443589. The next prime is 10666443673. The reversal of 10666443643 is 34634466601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10666443643 is a prime.

It is a super-2 number, since 2×10666443643² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10666443643.

It is not a weakly prime, because it can be changed into another prime (10666443673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333221821 + 5333221822.

It is an arithmetic number, because the mean of its divisors is an integer number (5333221822).

Almost surely, 2^10666443643 is an apocalyptic number.

10666443643 is a deficient number, since it is larger than the sum of its proper divisors (1).

10666443643 is an equidigital number, since it uses as much as digits as its factorization.

10666443643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 10666443643 in words is "ten billion, six hundred sixty-six million, four hundred forty-three thousand, six hundred forty-three".