6386669 has 2 divisors, whose sum is σ = 6386670. Its totient is φ = 6386668.

The previous prime is 6386623. The next prime is 6386671. The reversal of 6386669 is 9666836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5697769 + 688900 = 2387^2 + 830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6386669 is a prime.

It is a super-2 number, since 2×6386669² = 81579081831122, which contains 22 as substring.

Together with 6386671, 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 (6386069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3193334 + 3193335.

It is an arithmetic number, because the mean of its divisors is an integer number (3193335).

Almost surely, 2^6386669 is an apocalyptic number.

It is an amenable number.

6386669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6386669 is an equidigital number, since it uses as much as digits as its factorization.

6386669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 44.

The square root of 6386669 is about 2527.1859844499. The cubic root of 6386669 is about 185.5345532754.

The spelling of 6386669 in words is "six million, three hundred eighty-six thousand, six hundred sixty-nine".