6667638367666 has 8 divisors (see below), whose sum is σ = 10016318560284. Its totient is φ = 3328865514240.

The previous prime is 6667638367627. The next prime is 6667638367667.

6667638367666 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 6660162171441 + 7476196225 = 2580729^2 + 86465^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6667638367592 and 6667638367601.

It is not an unprimeable number, because it can be changed into a prime (6667638367667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476833115 + ... + 2476835806.

Almost surely, 2^{6667638367666} is an apocalyptic number.

6667638367666 is a deficient number, since it is larger than the sum of its proper divisors (3348680192618).

6667638367666 is a wasteful number, since it uses less digits than its factorization.

6667638367666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953669596.

The product of its digits is 5925685248, while the sum is 76.

The spelling of 6667638367666 in words is "six trillion, six hundred sixty-seven billion, six hundred thirty-eight million, three hundred sixty-seven thousand, six hundred sixty-six".