11664447 has 4 divisors (see below), whose sum is σ = 15552600. Its totient is φ = 7776296.

The previous prime is 11664437. The next prime is 11664479. The reversal of 11664447 is 74446611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11664447 - 2⁶ = 11664383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11664407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944072 + ... + 1944077.

It is an arithmetic number, because the mean of its divisors is an integer number (3888150).

Almost surely, 2^11664447 is an apocalyptic number.

11664447 is a deficient number, since it is larger than the sum of its proper divisors (3888153).

11664447 is an equidigital number, since it uses as much as digits as its factorization.

11664447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888152.

The product of its digits is 16128, while the sum is 33.

The square root of 11664447 is about 3415.3253139342. The cubic root of 11664447 is about 226.7886859848.

The spelling of 11664447 in words is "eleven million, six hundred sixty-four thousand, four hundred forty-seven".