11668567 has 4 divisors (see below), whose sum is σ = 12175920. Its totient is φ = 11161216.

The previous prime is 11668541. The next prime is 11668583. The reversal of 11668567 is 76586611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11668567 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 (11668597) 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 in 3 ways as a sum of consecutive naturals, for example, 253642 + ... + 253687.

It is an arithmetic number, because the mean of its divisors is an integer number (3043980).

Almost surely, 2^11668567 is an apocalyptic number.

11668567 is a deficient number, since it is larger than the sum of its proper divisors (507353).

11668567 is an equidigital number, since it uses as much as digits as its factorization.

11668567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507352.

The product of its digits is 60480, while the sum is 40.

The square root of 11668567 is about 3415.9284243087. The cubic root of 11668567 is about 226.8153841899.

The spelling of 11668567 in words is "eleven million, six hundred sixty-eight thousand, five hundred sixty-seven".