6778247 has 4 divisors (see below), whose sum is σ = 7746576. Its totient is φ = 5809920.

The previous prime is 6778241. The next prime is 6778249. The reversal of 6778247 is 7428776.

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

It is a cyclic number.

It is not a de Polignac number, because 6778247 - 2⁶ = 6778183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778241) 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, 484154 + ... + 484167.

It is an arithmetic number, because the mean of its divisors is an integer number (1936644).

Almost surely, 2^6778247 is an apocalyptic number.

6778247 is a deficient number, since it is larger than the sum of its proper divisors (968329).

6778247 is an equidigital number, since it uses as much as digits as its factorization.

6778247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968328.

The product of its digits is 131712, while the sum is 41.

The square root of 6778247 is about 2603.5066736999. The cubic root of 6778247 is about 189.2514127540.

The spelling of 6778247 in words is "six million, seven hundred seventy-eight thousand, two hundred forty-seven".