6775385447 has 4 divisors (see below), whose sum is σ = 6776372736. Its totient is φ = 6774398160.

The previous prime is 6775385431. The next prime is 6775385459. The reversal of 6775385447 is 7445835776.

It is a happy number.

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 6775385447 - 2⁴ = 6775385431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6775385392 and 6775385401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6775385347) 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, 483278 + ... + 497099.

It is an arithmetic number, because the mean of its divisors is an integer number (1694093184).

Almost surely, 2^6775385447 is an apocalyptic number.

6775385447 is a deficient number, since it is larger than the sum of its proper divisors (987289).

6775385447 is an equidigital number, since it uses as much as digits as its factorization.

6775385447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987288.

The product of its digits is 19756800, while the sum is 56.

The square root of 6775385447 is about 82312.7295562479. The cubic root of 6775385447 is about 1892.2477709763.

The spelling of 6775385447 in words is "six billion, seven hundred seventy-five million, three hundred eighty-five thousand, four hundred forty-seven".