6678399 has 32 divisors (see below), whose sum is σ = 11612160. Its totient is φ = 3313152.

The previous prime is 6678383. The next prime is 6678401. The reversal of 6678399 is 9938766.

It is a happy number.

It is not a de Polignac number, because 6678399 - 2⁴ = 6678383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3922 + ... + 5360.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^6678399 is an apocalyptic number.

6678399 is a deficient number, since it is larger than the sum of its proper divisors (4933761).

6678399 is a wasteful number, since it uses less digits than its factorization.

6678399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its digits is 489888, while the sum is 48.

The square root of 6678399 is about 2584.2598553551. The cubic root of 6678399 is about 188.3175465575.

The spelling of 6678399 in words is "six million, six hundred seventy-eight thousand, three hundred ninety-nine".