11666104031 has 4 divisors (see below), whose sum is σ = 11673972072. Its totient is φ = 11658235992.

The previous prime is 11666104007. The next prime is 11666104103. The reversal of 11666104031 is 13040166611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13040166611 = 229 ⋅56943959.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11666104031 is a prime.

It is a super-2 number, since 2×11666104031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11666103985 and 11666104003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666404031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931796 + ... + 3934761.

It is an arithmetic number, because the mean of its divisors is an integer number (2918493018).

Almost surely, 2^11666104031 is an apocalyptic number.

11666104031 is a deficient number, since it is larger than the sum of its proper divisors (7868041).

11666104031 is an equidigital number, since it uses as much as digits as its factorization.

11666104031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868040.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 11666104031 in words is "eleven billion, six hundred sixty-six million, one hundred four thousand, thirty-one".