16866671 has 2 divisors, whose sum is σ = 16866672. Its totient is φ = 16866670.

The previous prime is 16866611. The next prime is 16866673. The reversal of 16866671 is 17666861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16866671 - 2¹⁴ = 16850287 is a prime.

Together with 16866673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16866673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8433335 + 8433336.

It is an arithmetic number, because the mean of its divisors is an integer number (8433336).

Almost surely, 2^16866671 is an apocalyptic number.

16866671 is a deficient number, since it is larger than the sum of its proper divisors (1).

16866671 is an equidigital number, since it uses as much as digits as its factorization.

16866671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 16866671 is about 4106.9052825698. The cubic root of 16866671 is about 256.4541853837.

The spelling of 16866671 in words is "sixteen million, eight hundred sixty-six thousand, six hundred seventy-one".