243648588666 has 32 divisors (see below), whose sum is σ = 556925898240. Its totient is φ = 69612027696.

The previous prime is 243648588649. The next prime is 243648588679. The reversal of 243648588666 is 666885846342.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 243648588597 and 243648588606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2650665 + ... + 2741043.

It is an arithmetic number, because the mean of its divisors is an integer number (17403934320).

Almost surely, 2^243648588666 is an apocalyptic number.

243648588666 is an abundant number, since it is smaller than the sum of its proper divisors (313277309574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243648588666 is a wasteful number, since it uses less digits than its factorization.

243648588666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154578.

The product of its digits is 318504960, while the sum is 66.

The spelling of 243648588666 in words is "two hundred forty-three billion, six hundred forty-eight million, five hundred eighty-eight thousand, six hundred sixty-six".