243665406606 has 32 divisors (see below), whose sum is σ = 496576604160. Its totient is φ = 79681151264.

The previous prime is 243665406601. The next prime is 243665406613. The reversal of 243665406606 is 606604566342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243665406601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3598975 + ... + 3666053.

It is an arithmetic number, because the mean of its divisors is an integer number (15518018880).

Almost surely, 2^243665406606 is an apocalyptic number.

243665406606 is an abundant number, since it is smaller than the sum of its proper divisors (252911197554).

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

243665406606 is a wasteful number, since it uses less digits than its factorization.

243665406606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78560.

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 243665406606 in words is "two hundred forty-three billion, six hundred sixty-five million, four hundred six thousand, six hundred six".