6861306663 has 64 divisors (see below), whose sum is σ = 11217346560. Its totient is φ = 4130438400.

The previous prime is 6861306589. The next prime is 6861306679. The reversal of 6861306663 is 3666031686.

It is a happy number.

6861306663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6861306663 - 2¹⁷ = 6861175591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861306563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 784945 + ... + 793637.

It is an arithmetic number, because the mean of its divisors is an integer number (175271040).

Almost surely, 2^6861306663 is an apocalyptic number.

6861306663 is a deficient number, since it is larger than the sum of its proper divisors (4356039897).

6861306663 is a wasteful number, since it uses less digits than its factorization.

6861306663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8797 (or 8791 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 6861306663 is about 82833.0046720509. The cubic root of 6861306663 is about 1900.2129644020.

The spelling of 6861306663 in words is "six billion, eight hundred sixty-one million, three hundred six thousand, six hundred sixty-three".