243441066665 has 16 divisors (see below), whose sum is σ = 316506693888. Its totient is φ = 179034084096.

The previous prime is 243441066599. The next prime is 243441066683. The reversal of 243441066665 is 566660144342.

It is a cyclic number.

It is not a de Polignac number, because 243441066665 - 2¹² = 243441062569 is a prime.

It is a Duffinian number.

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, 33298817 + ... + 33306126.

It is an arithmetic number, because the mean of its divisors is an integer number (19781668368).

Almost surely, 2^243441066665 is an apocalyptic number.

It is an amenable number.

243441066665 is a deficient number, since it is larger than the sum of its proper divisors (73065627223).

243441066665 is a wasteful number, since it uses less digits than its factorization.

243441066665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66605008.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 243441066665 in words is "two hundred forty-three billion, four hundred forty-one million, sixty-six thousand, six hundred sixty-five".