6720878 has 4 divisors (see below), whose sum is σ = 10081320. Its totient is φ = 3360438.

The previous prime is 6720841. The next prime is 6720887. The reversal of 6720878 is 8780276.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1680218 + ... + 1680221.

It is an arithmetic number, because the mean of its divisors is an integer number (2520330).

Almost surely, 2^6720878 is an apocalyptic number.

6720878 is a deficient number, since it is larger than the sum of its proper divisors (3360442).

6720878 is a wasteful number, since it uses less digits than its factorization.

6720878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360441.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 6720878 is about 2592.4656217586. The cubic root of 6720878 is about 188.7159773772.

The spelling of 6720878 in words is "six million, seven hundred twenty thousand, eight hundred seventy-eight".