6678363967646 has 8 divisors (see below), whose sum is σ = 11448623944560. Its totient is φ = 2862155986128.

The previous prime is 6678363967631. The next prime is 6678363967663. The reversal of 6678363967646 is 6467693638766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238512998831 + ... + 238512998858.

It is an arithmetic number, because the mean of its divisors is an integer number (1431077993070).

Almost surely, 2^{6678363967646} is an apocalyptic number.

6678363967646 is a deficient number, since it is larger than the sum of its proper divisors (4770259976914).

6678363967646 is a wasteful number, since it uses less digits than its factorization.

6678363967646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477025997698.

The product of its digits is 5925685248, while the sum is 77.

The spelling of 6678363967646 in words is "six trillion, six hundred seventy-eight billion, three hundred sixty-three million, nine hundred sixty-seven thousand, six hundred forty-six".