6647735344918 has 4 divisors (see below), whose sum is σ = 9971603017380. Its totient is φ = 3323867672458.

The previous prime is 6647735344903. The next prime is 6647735344963. The reversal of 6647735344918 is 8194435377466.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661933836228 + ... + 1661933836231.

It is an arithmetic number, because the mean of its divisors is an integer number (2492900754345).

Almost surely, 2^{6647735344918} is an apocalyptic number.

6647735344918 is a deficient number, since it is larger than the sum of its proper divisors (3323867672462).

6647735344918 is a wasteful number, since it uses less digits than its factorization.

6647735344918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323867672461.

The product of its digits is 365783040, while the sum is 67.

The spelling of 6647735344918 in words is "six trillion, six hundred forty-seven billion, seven hundred thirty-five million, three hundred forty-four thousand, nine hundred eighteen".