6778543 has 2 divisors, whose sum is σ = 6778544. Its totient is φ = 6778542.

The previous prime is 6778517. The next prime is 6778559. The reversal of 6778543 is 3458776.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6778543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6778496 and 6778505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389271 + 3389272.

It is an arithmetic number, because the mean of its divisors is an integer number (3389272).

Almost surely, 2^6778543 is an apocalyptic number.

6778543 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778543 is an equidigital number, since it uses as much as digits as its factorization.

6778543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 6778543 is about 2603.5635194863. The cubic root of 6778543 is about 189.2541675274.

The spelling of 6778543 in words is "six million, seven hundred seventy-eight thousand, five hundred forty-three".