6778751 has 8 divisors (see below), whose sum is σ = 7762944. Its totient is φ = 5798520.

The previous prime is 6778741. The next prime is 6778769. The reversal of 6778751 is 1578776.

6778751 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6778751 - 2¹⁴ = 6762367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6778699 and 6778708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5846 + ... + 6908.

It is an arithmetic number, because the mean of its divisors is an integer number (970368).

Almost surely, 2^6778751 is an apocalyptic number.

6778751 is the 2126-th pentagonal number.

6778751 is a deficient number, since it is larger than the sum of its proper divisors (984193).

6778751 is a wasteful number, since it uses less digits than its factorization.

6778751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its digits is 82320, while the sum is 41.

The square root of 6778751 is about 2603.6034644316. The cubic root of 6778751 is about 189.2561032661.

The spelling of 6778751 in words is "six million, seven hundred seventy-eight thousand, seven hundred fifty-one".