6785256997 has 4 divisors (see below), whose sum is σ = 6785892256. Its totient is φ = 6784621740.

The previous prime is 6785256977. The next prime is 6785257057. The reversal of 6785256997 is 7996525876.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6785256997 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 (6785256977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301329 + ... + 323062.

It is an arithmetic number, because the mean of its divisors is an integer number (1696473064).

Almost surely, 2^6785256997 is an apocalyptic number.

It is an amenable number.

6785256997 is a deficient number, since it is larger than the sum of its proper divisors (635259).

6785256997 is a wasteful number, since it uses less digits than its factorization.

6785256997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635258.

The product of its digits is 57153600, while the sum is 64.

The square root of 6785256997 is about 82372.6714208056. The cubic root of 6785256997 is about 1893.1663093220.

The spelling of 6785256997 in words is "six billion, seven hundred eighty-five million, two hundred fifty-six thousand, nine hundred ninety-seven".