6378663 has 16 divisors (see below), whose sum is σ = 8781696. Its totient is φ = 4116000.

The previous prime is 6378629. The next prime is 6378703. The reversal of 6378663 is 3668736.

It is a happy number.

It is not a de Polignac number, because 6378663 - 2¹⁰ = 6377639 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 3⁵ + 7⁸ + 8⁵ + 6⁷ + 6⁷ + 3⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378563) 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 15 ways as a sum of consecutive naturals, for example, 25288 + ... + 25538.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^6378663 is an apocalyptic number.

6378663 is a deficient number, since it is larger than the sum of its proper divisors (2403033).

6378663 is a wasteful number, since it uses less digits than its factorization.

6378663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494.

The product of its digits is 108864, while the sum is 39.

The square root of 6378663 is about 2525.6015125114. The cubic root of 6378663 is about 185.4569953322.

The spelling of 6378663 in words is "six million, three hundred seventy-eight thousand, six hundred sixty-three".