6778958 has 4 divisors (see below), whose sum is σ = 10168440. Its totient is φ = 3389478.

The previous prime is 6778949. The next prime is 6778963. The reversal of 6778958 is 8598776.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1694738 + ... + 1694741.

It is an arithmetic number, because the mean of its divisors is an integer number (2542110).

Almost surely, 2^6778958 is an apocalyptic number.

6778958 is a deficient number, since it is larger than the sum of its proper divisors (3389482).

6778958 is a wasteful number, since it uses less digits than its factorization.

6778958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389481.

The product of its digits is 846720, while the sum is 50.

The square root of 6778958 is about 2603.6432167254. The cubic root of 6778958 is about 189.2580296591.

The spelling of 6778958 in words is "six million, seven hundred seventy-eight thousand, nine hundred fifty-eight".