6778378 has 8 divisors (see below), whose sum is σ = 10194372. Its totient is φ = 3380256.

The previous prime is 6778351. The next prime is 6778379. The reversal of 6778378 is 8738776.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6165289 + 613089 = 2483^2 + 783^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6778379) 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, 3475 + ... + 5062.

Almost surely, 2^6778378 is an apocalyptic number.

6778378 is a deficient number, since it is larger than the sum of its proper divisors (3415994).

6778378 is a wasteful number, since it uses less digits than its factorization.

6778378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936.

The product of its digits is 395136, while the sum is 46.

The square root of 6778378 is about 2603.5318319544. The cubic root of 6778378 is about 189.2526319373.

The spelling of 6778378 in words is "six million, seven hundred seventy-eight thousand, three hundred seventy-eight".