11666747 has 2 divisors, whose sum is σ = 11666748. Its totient is φ = 11666746.

The previous prime is 11666737. The next prime is 11666749. The reversal of 11666747 is 74766611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11666747 - 2⁸ = 11666491 is a prime.

It is a super-2 number, since 2×11666747² = 272225971124018, which contains 22 as substring.

Together with 11666749, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11666747.

It is not a weakly prime, because it can be changed into another prime (11666749) 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 as a sum of consecutive naturals, namely, 5833373 + 5833374.

It is an arithmetic number, because the mean of its divisors is an integer number (5833374).

Almost surely, 2^11666747 is an apocalyptic number.

11666747 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666747 is an equidigital number, since it uses as much as digits as its factorization.

11666747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 11666747 is about 3415.6620148955. The cubic root of 11666747 is about 226.8035910976.

The spelling of 11666747 in words is "eleven million, six hundred sixty-six thousand, seven hundred forty-seven".