6778605 has 16 divisors (see below), whose sum is σ = 11220480. Its totient is φ = 3490368.

The previous prime is 6778589. The next prime is 6778621. The reversal of 6778605 is 5068776.

It is an interprime number because it is at equal distance from previous prime (6778589) and next prime (6778621).

It is not a de Polignac number, because 6778605 - 2⁴ = 6778589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7357 + ... + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (701280).

Almost surely, 2^6778605 is an apocalyptic number.

It is an amenable number.

6778605 is a deficient number, since it is larger than the sum of its proper divisors (4441875).

6778605 is a wasteful number, since it uses less digits than its factorization.

6778605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15620.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 6778605 is about 2603.5754262168. The cubic root of 6778605 is about 189.2547445306.

The spelling of 6778605 in words is "six million, seven hundred seventy-eight thousand, six hundred five".