6780406 has 8 divisors (see below), whose sum is σ = 10208160. Its totient is φ = 3377688.

The previous prime is 6780383. The next prime is 6780407. The reversal of 6780406 is 6040876.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5566 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (1276020).

Almost surely, 2^6780406 is an apocalyptic number.

6780406 is a deficient number, since it is larger than the sum of its proper divisors (3427754).

6780406 is a wasteful number, since it uses less digits than its factorization.

6780406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12518.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 6780406 is about 2603.9212737715. The cubic root of 6780406 is about 189.2715040070.

The spelling of 6780406 in words is "six million, seven hundred eighty thousand, four hundred six".