11668447 has 8 divisors (see below), whose sum is σ = 13386752. Its totient is φ = 9963000.

The previous prime is 11668441. The next prime is 11668487. The reversal of 11668447 is 74486611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11668447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11668441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179 + ... + 4972.

It is an arithmetic number, because the mean of its divisors is an integer number (1673344).

Almost surely, 2^11668447 is an apocalyptic number.

11668447 is a deficient number, since it is larger than the sum of its proper divisors (1718305).

11668447 is an equidigital number, since it uses as much as digits as its factorization.

11668447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429.

The product of its digits is 32256, while the sum is 37.

The square root of 11668447 is about 3415.9108594927. The cubic root of 11668447 is about 226.8146066612.

Adding to 11668447 its product of digits (32256), we get a triangular number (11700703 = T₄₈₃₇).

The spelling of 11668447 in words is "eleven million, six hundred sixty-eight thousand, four hundred forty-seven".