11666545 has 16 divisors (see below), whose sum is σ = 15630912. Its totient is φ = 8285760.

The previous prime is 11666533. The next prime is 11666549. The reversal of 11666545 is 54566611.

It is a happy number.

It is not a de Polignac number, because 11666545 - 2²¹ = 9569393 is a prime.

It is a super-2 number, since 2×11666545² = 272216544474050, 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 11666545.

It is not an unprimeable number, because it can be changed into a prime (11666549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102 + ... + 4831.

It is an arithmetic number, because the mean of its divisors is an integer number (976932).

Almost surely, 2^11666545 is an apocalyptic number.

It is an amenable number.

11666545 is a deficient number, since it is larger than the sum of its proper divisors (3964367).

11666545 is a wasteful number, since it uses less digits than its factorization.

11666545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992.

The product of its digits is 21600, while the sum is 34.

The square root of 11666545 is about 3415.6324450971. The cubic root of 11666545 is about 226.8022821184.

The spelling of 11666545 in words is "eleven million, six hundred sixty-six thousand, five hundred forty-five".