663439442241 has 4 divisors (see below), whose sum is σ = 884585922992. Its totient is φ = 442292961492.

The previous prime is 663439442227. The next prime is 663439442273. The reversal of 663439442241 is 142244934366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663439442241 - 2¹⁷ = 663439311169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663439440241) 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, 110573240371 + ... + 110573240376.

It is an arithmetic number, because the mean of its divisors is an integer number (221146480748).

Almost surely, 2^663439442241 is an apocalyptic number.

It is an amenable number.

663439442241 is a deficient number, since it is larger than the sum of its proper divisors (221146480751).

663439442241 is a wasteful number, since it uses less digits than its factorization.

663439442241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221146480750.

The product of its digits is 2985984, while the sum is 48.

The spelling of 663439442241 in words is "six hundred sixty-three billion, four hundred thirty-nine million, four hundred forty-two thousand, two hundred forty-one".