11666533 has 2 divisors, whose sum is σ = 11666534. Its totient is φ = 11666532.

The previous prime is 11666521. The next prime is 11666549. The reversal of 11666533 is 33566611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6385729 + 5280804 = 2527^2 + 2298^2 .

It is a cyclic number.

It is not a de Polignac number, because 11666533 - 2⁹ = 11666021 is a prime.

It is a super-2 number, since 2×11666533² = 272215984480178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11666495 and 11666504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11666833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833266 + 5833267.

It is an arithmetic number, because the mean of its divisors is an integer number (5833267).

Almost surely, 2^11666533 is an apocalyptic number.

It is an amenable number.

11666533 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666533 is an equidigital number, since it uses as much as digits as its factorization.

11666533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 11666533 is about 3415.6306884674. The cubic root of 11666533 is about 226.8022043567.

The spelling of 11666533 in words is "eleven million, six hundred sixty-six thousand, five hundred thirty-three".