11664671 has 2 divisors, whose sum is σ = 11664672. Its totient is φ = 11664670.

The previous prime is 11664659. The next prime is 11664673. The reversal of 11664671 is 17646611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11664671 - 2¹⁰ = 11663647 is a prime.

Together with 11664673, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₇₆₇₄₇₁ and since 11664671 and 767471 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11664673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832335 + 5832336.

It is an arithmetic number, because the mean of its divisors is an integer number (5832336).

Almost surely, 2^11664671 is an apocalyptic number.

11664671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11664671 is an equidigital number, since it uses as much as digits as its factorization.

11664671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 11664671 is about 3415.3581071390. The cubic root of 11664671 is about 226.7901376993.

The spelling of 11664671 in words is "eleven million, six hundred sixty-four thousand, six hundred seventy-one".