11666851 has 6 divisors (see below), whose sum is σ = 13571700. Its totient is φ = 10000116.

The previous prime is 11666843. The next prime is 11666861. The reversal of 11666851 is 15866611.

11666851 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 11666851 - 2³ = 11666843 is a prime.

It is a super-2 number, since 2×11666851² = 272230824512402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11666801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119001 + ... + 119098.

It is an arithmetic number, because the mean of its divisors is an integer number (2261950).

Almost surely, 2^11666851 is an apocalyptic number.

11666851 is a deficient number, since it is larger than the sum of its proper divisors (1904849).

11666851 is an equidigital number, since it uses as much as digits as its factorization.

11666851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238113 (or 238106 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 11666851 is about 3415.6772388503. The cubic root of 11666851 is about 226.8042650217.

The spelling of 11666851 in words is "eleven million, six hundred sixty-six thousand, eight hundred fifty-one".