11666077561666 has 24 divisors (see below), whose sum is σ = 19235828591280. Its totient is φ = 5302414417080.

The previous prime is 11666077561657. The next prime is 11666077561703. The reversal of 11666077561666 is 66616577066611.

It is a junction number, because it is equal to n+sod(n) for n = 11666077561598 and 11666077561607.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2129625 + ... + 5278963.

It is an arithmetic number, because the mean of its divisors is an integer number (801492857970).

Almost surely, 2^{11666077561666} is an apocalyptic number.

11666077561666 is a deficient number, since it is larger than the sum of its proper divisors (7569751029614).

11666077561666 is a wasteful number, since it uses less digits than its factorization.

11666077561666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164670 (or 3164659 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 64.

The spelling of 11666077561666 in words is "eleven trillion, six hundred sixty-six billion, seventy-seven million, five hundred sixty-one thousand, six hundred sixty-six".