11866663019 has 2 divisors, whose sum is σ = 11866663020. Its totient is φ = 11866663018.

The previous prime is 11866662989. The next prime is 11866663027. The reversal of 11866663019 is 91036666811.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11866663019 is a prime.

It is a super-2 number, since 2×11866663019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11866663049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933331509 + 5933331510.

It is an arithmetic number, because the mean of its divisors is an integer number (5933331510).

Almost surely, 2^11866663019 is an apocalyptic number.

11866663019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11866663019 is an equidigital number, since it uses as much as digits as its factorization.

11866663019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 11866663019 in words is "eleven billion, eight hundred sixty-six million, six hundred sixty-three thousand, nineteen".