6780478 has 4 divisors (see below), whose sum is σ = 10170720. Its totient is φ = 3390238.

The previous prime is 6780463. The next prime is 6780479. The reversal of 6780478 is 8740876.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6780478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1695118 + ... + 1695121.

It is an arithmetic number, because the mean of its divisors is an integer number (2542680).

Almost surely, 2^6780478 is an apocalyptic number.

6780478 is a deficient number, since it is larger than the sum of its proper divisors (3390242).

6780478 is a wasteful number, since it uses less digits than its factorization.

6780478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390241.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 6780478 is about 2603.9350990376. The cubic root of 6780478 is about 189.2721739522.

The spelling of 6780478 in words is "six million, seven hundred eighty thousand, four hundred seventy-eight".