10666211669 has 4 divisors (see below), whose sum is σ = 10841067660. Its totient is φ = 10491355680.

The previous prime is 10666211657. The next prime is 10666211671. The reversal of 10666211669 is 96611266601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 738480625 + 9927731044 = 27175^2 + 99638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10666211669 is a prime.

It is a super-2 number, since 2×10666211669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666216669) 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 in 3 ways as a sum of consecutive naturals, for example, 87427904 + ... + 87428025.

It is an arithmetic number, because the mean of its divisors is an integer number (2710266915).

Almost surely, 2^10666211669 is an apocalyptic number.

It is an amenable number.

10666211669 is a deficient number, since it is larger than the sum of its proper divisors (174855991).

10666211669 is an equidigital number, since it uses as much as digits as its factorization.

10666211669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174855990.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 10666211669 in words is "ten billion, six hundred sixty-six million, two hundred eleven thousand, six hundred sixty-nine".