6781165830 has 32 divisors (see below), whose sum is σ = 18083109600. Its totient is φ = 1808310816.

The previous prime is 6781165813. The next prime is 6781165837. The reversal of 6781165830 is 385611876.

6781165830 is a `hidden beast` number, since 67 + 8 + 1 + 1 + 6 + 583 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781165837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12557445 + ... + 12557984.

It is an arithmetic number, because the mean of its divisors is an integer number (565097175).

Almost surely, 2^6781165830 is an apocalyptic number.

6781165830 is an abundant number, since it is smaller than the sum of its proper divisors (11301943770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6781165830 is a wasteful number, since it uses less digits than its factorization.

6781165830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25115445 (or 25115439 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 6781165830 is about 82347.8343977545. The cubic root of 6781165830 is about 1892.7857382927.

The spelling of 6781165830 in words is "six billion, seven hundred eighty-one million, one hundred sixty-five thousand, eight hundred thirty".