11660666663 has 2 divisors, whose sum is σ = 11660666664. Its totient is φ = 11660666662.

The previous prime is 11660666593. The next prime is 11660666683. The reversal of 11660666663 is 36666606611.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36666606611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11660666663 is a prime.

It is a super-2 number, since 2×11660666663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11660666683) 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, 5830333331 + 5830333332.

It is an arithmetic number, because the mean of its divisors is an integer number (5830333332).

Almost surely, 2^11660666663 is an apocalyptic number.

11660666663 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660666663 is an equidigital number, since it uses as much as digits as its factorization.

11660666663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 47.

The spelling of 11660666663 in words is "eleven billion, six hundred sixty million, six hundred sixty-six thousand, six hundred sixty-three".