11666567 has 4 divisors (see below), whose sum is σ = 12727176. Its totient is φ = 10605960.

The previous prime is 11666549. The next prime is 11666579. The reversal of 11666567 is 76566611.

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 11666567 - 2¹⁴ = 11650183 is a prime.

It is a super-2 number, since 2×11666567² = 272217571130978, 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 11666567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666867) 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, 530288 + ... + 530309.

It is an arithmetic number, because the mean of its divisors is an integer number (3181794).

Almost surely, 2^11666567 is an apocalyptic number.

11666567 is a deficient number, since it is larger than the sum of its proper divisors (1060609).

11666567 is a wasteful number, since it uses less digits than its factorization.

11666567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060608.

The product of its digits is 45360, while the sum is 38.

The square root of 11666567 is about 3415.6356655826. The cubic root of 11666567 is about 226.8024246812.

The spelling of 11666567 in words is "eleven million, six hundred sixty-six thousand, five hundred sixty-seven".