6378669 has 20 divisors (see below), whose sum is σ = 10396320. Its totient is φ = 3865320.

The previous prime is 6378629. The next prime is 6378703. The reversal of 6378669 is 9668736.

6378669 is a `hidden beast` number, since 637 + 8 + 6 + 6 + 9 = 666.

It is not a de Polignac number, because 6378669 - 2¹¹ = 6376621 is a prime.

It is a super-2 number, since 2×6378669² = 81374836423122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378629) 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 in 19 ways as a sum of consecutive naturals, for example, 2689 + ... + 4470.

It is an arithmetic number, because the mean of its divisors is an integer number (519816).

Almost surely, 2^6378669 is an apocalyptic number.

It is an amenable number.

6378669 is a deficient number, since it is larger than the sum of its proper divisors (4017651).

6378669 is a wasteful number, since it uses less digits than its factorization.

6378669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182 (or 7173 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6378669 is about 2525.6027003470. The cubic root of 6378669 is about 185.4570534813.

The spelling of 6378669 in words is "six million, three hundred seventy-eight thousand, six hundred sixty-nine".