6662173376818 has 16 divisors (see below), whose sum is σ = 10617256736280. Its totient is φ = 3129296720256.

The previous prime is 6662173376797. The next prime is 6662173376933. The reversal of 6662173376818 is 8186733712666.

It can be written as a sum of positive squares in 4 ways, for example, as 6479585523009 + 182587853809 = 2545503^2 + 427303^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6662173376818.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1552228371 + ... + 1552232662.

Almost surely, 2^{6662173376818} is an apocalyptic number.

6662173376818 is a deficient number, since it is larger than the sum of its proper divisors (3955083359462).

6662173376818 is a wasteful number, since it uses less digits than its factorization.

6662173376818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104461101.

The product of its digits is 73156608, while the sum is 64.

The spelling of 6662173376818 in words is "six trillion, six hundred sixty-two billion, one hundred seventy-three million, three hundred seventy-six thousand, eight hundred eighteen".