11666775 has 12 divisors (see below), whose sum is σ = 19289192. Its totient is φ = 6222240.

The previous prime is 11666749. The next prime is 11666797. The reversal of 11666775 is 57766611.

It is not a de Polignac number, because 11666775 - 2⁷ = 11666647 is a prime.

It is a super-2 number, since 2×11666775² = 272227277801250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 77704 + ... + 77853.

Almost surely, 2^11666775 is an apocalyptic number.

11666775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11666775 is a deficient number, since it is larger than the sum of its proper divisors (7622417).

11666775 is a wasteful number, since it uses less digits than its factorization.

11666775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155570 (or 155565 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 11666775 is about 3415.6661136592. Note that the first 3 decimals coincide. The cubic root of 11666775 is about 226.8037725391.

It can be divided in two parts, 1166677 and 5, that multiplied together give a palindrome (5833385).

The spelling of 11666775 in words is "eleven million, six hundred sixty-six thousand, seven hundred seventy-five".