11666139 has 4 divisors (see below), whose sum is σ = 15554856. Its totient is φ = 7777424.

The previous prime is 11666117. The next prime is 11666141. The reversal of 11666139 is 93166611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93166611 = 3 ⋅31055537.

It is a cyclic number.

It is not a de Polignac number, because 11666139 - 2¹² = 11662043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11666159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944354 + ... + 1944359.

It is an arithmetic number, because the mean of its divisors is an integer number (3888714).

Almost surely, 2^11666139 is an apocalyptic number.

11666139 is a deficient number, since it is larger than the sum of its proper divisors (3888717).

11666139 is an equidigital number, since it uses as much as digits as its factorization.

11666139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888716.

The product of its digits is 5832, while the sum is 33.

The square root of 11666139 is about 3415.5730119557. The cubic root of 11666139 is about 226.7996511539.

The spelling of 11666139 in words is "eleven million, six hundred sixty-six thousand, one hundred thirty-nine".