11871766 has 4 divisors (see below), whose sum is σ = 17807652. Its totient is φ = 5935882.

The previous prime is 11871737. The next prime is 11871767. The reversal of 11871766 is 66717811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66717811 = 43 ⋅1551577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871767) 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 as a sum of consecutive naturals, namely, 2967940 + ... + 2967943.

It is an arithmetic number, because the mean of its divisors is an integer number (4451913).

Almost surely, 2^11871766 is an apocalyptic number.

11871766 is a deficient number, since it is larger than the sum of its proper divisors (5935886).

11871766 is an equidigital number, since it uses as much as digits as its factorization.

11871766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935885.

The product of its digits is 14112, while the sum is 37.

The square root of 11871766 is about 3445.5429180319. The cubic root of 11871766 is about 228.1244191141.

The spelling of 11871766 in words is "eleven million, eight hundred seventy-one thousand, seven hundred sixty-six".