6668878 has 8 divisors (see below), whose sum is σ = 10021968. Its totient is φ = 3328224.

The previous prime is 6668861. The next prime is 6668881. The reversal of 6668878 is 8788666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1626 + ... + 3997.

It is an arithmetic number, because the mean of its divisors is an integer number (1252746).

Almost surely, 2^6668878 is an apocalyptic number.

6668878 is a deficient number, since it is larger than the sum of its proper divisors (3353090).

6668878 is a wasteful number, since it uses less digits than its factorization.

6668878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218.

The product of its digits is 774144, while the sum is 49.

The square root of 6668878 is about 2582.4170848258. The cubic root of 6668878 is about 188.2280129192.

It can be divided in two parts, 66688 and 78, that added together give a palindrome (66766).

The spelling of 6668878 in words is "six million, six hundred sixty-eight thousand, eight hundred seventy-eight".