663241243 has 16 divisors (see below), whose sum is σ = 791688960. Its totient is φ = 543740256.

The previous prime is 663241237. The next prime is 663241259. The reversal of 663241243 is 342142366.

It is a cyclic number.

It is not a de Polignac number, because 663241243 - 2²⁹ = 126370331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663241273) 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, 6421 + ... + 36982.

It is an arithmetic number, because the mean of its divisors is an integer number (49480560).

Almost surely, 2^663241243 is an apocalyptic number.

663241243 is a deficient number, since it is larger than the sum of its proper divisors (128447717).

663241243 is a wasteful number, since it uses less digits than its factorization.

663241243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43506.

The product of its digits is 20736, while the sum is 31.

The square root of 663241243 is about 25753.4705039923. The cubic root of 663241243 is about 872.0817032519.

The spelling of 663241243 in words is "six hundred sixty-three million, two hundred forty-one thousand, two hundred forty-three".