6678993 has 8 divisors (see below), whose sum is σ = 9292608. Its totient is φ = 4259024.

The previous prime is 6678979. The next prime is 6679009. The reversal of 6678993 is 3998766.

It is a happy number.

6678993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6678993 - 2⁶ = 6678929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6678593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48330 + ... + 48467.

It is an arithmetic number, because the mean of its divisors is an integer number (1161576).

Almost surely, 2^6678993 is an apocalyptic number.

It is an amenable number.

6678993 is a deficient number, since it is larger than the sum of its proper divisors (2613615).

6678993 is a wasteful number, since it uses less digits than its factorization.

6678993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96823.

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

The square root of 6678993 is about 2584.3747793228. The cubic root of 6678993 is about 188.3231295975.

The spelling of 6678993 in words is "six million, six hundred seventy-eight thousand, nine hundred ninety-three".