11668321 has 12 divisors (see below), whose sum is σ = 13832532. Its totient is φ = 9810528.

The previous prime is 11668309. The next prime is 11668333. The reversal of 11668321 is 12386611.

It is an interprime number because it is at equal distance from previous prime (11668309) and next prime (11668333).

It can be written as a sum of positive squares in 2 ways, for example, as 10595025 + 1073296 = 3255^2 + 1036^2 .

It is not a de Polignac number, because 11668321 - 2⁷ = 11668193 is a prime.

It is a super-2 number, since 2×11668321² = 272299429918082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11668321.

It is not an unprimeable number, because it can be changed into a prime (11668021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351 + ... + 4843.

It is an arithmetic number, because the mean of its divisors is an integer number (1152711).

Almost surely, 2^11668321 is an apocalyptic number.

It is an amenable number.

11668321 is a deficient number, since it is larger than the sum of its proper divisors (2164211).

11668321 is an equidigital number, since it uses as much as digits as its factorization.

11668321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560 (or 4553 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 11668321 is about 3415.8924163387. The cubic root of 11668321 is about 226.8137902502.

The spelling of 11668321 in words is "eleven million, six hundred sixty-eight thousand, three hundred twenty-one".