11066666661 has 16 divisors (see below), whose sum is σ = 16398548800. Its totient is φ = 7376208624.

The previous prime is 11066666651. The next prime is 11066666687. The reversal of 11066666661 is 16666666011.

It is a de Polignac number, because none of the positive numbers 2^k-11066666661 is a prime.

It is a super-2 number, since 2×11066666661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11066666651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93555 + ... + 175743.

It is an arithmetic number, because the mean of its divisors is an integer number (1024909300).

Almost surely, 2^11066666661 is an apocalyptic number.

It is an amenable number.

11066666661 is a deficient number, since it is larger than the sum of its proper divisors (5331882139).

11066666661 is an equidigital number, since it uses as much as digits as its factorization.

11066666661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87185 (or 87179 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 11066666661 in words is "eleven billion, sixty-six million, six hundred sixty-six thousand, six hundred sixty-one".