8666419 has 2 divisors, whose sum is σ = 8666420. Its totient is φ = 8666418.

The previous prime is 8666417. The next prime is 8666431. The reversal of 8666419 is 9146668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8666419 - 2¹ = 8666417 is a prime.

It is a super-2 number, since 2×8666419² = 150213636567122, which contains 22 as substring.

Together with 8666417, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8666417) 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, 4333209 + 4333210.

It is an arithmetic number, because the mean of its divisors is an integer number (4333210).

Almost surely, 2^8666419 is an apocalyptic number.

8666419 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666419 is an equidigital number, since it uses as much as digits as its factorization.

8666419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 8666419 is about 2943.8782243836. The cubic root of 8666419 is about 205.4060482634.

Subtracting 8666419 from its reverse (9146668), we obtain a square (480249 = 693²).

The spelling of 8666419 in words is "eight million, six hundred sixty-six thousand, four hundred nineteen".