8441321663 has 4 divisors (see below), whose sum is σ = 8443915080. Its totient is φ = 8438728248.

The previous prime is 8441321641. The next prime is 8441321677. The reversal of 8441321663 is 3661231448.

It is a happy number.

8441321663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8441321663 - 2¹⁸ = 8441059519 is a prime.

It is a super-2 number, since 2×8441321663² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8441321633) 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, 1291820 + ... + 1298337.

It is an arithmetic number, because the mean of its divisors is an integer number (2110978770).

Almost surely, 2^8441321663 is an apocalyptic number.

8441321663 is a deficient number, since it is larger than the sum of its proper divisors (2593417).

8441321663 is a wasteful number, since it uses less digits than its factorization.

8441321663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593416.

The product of its digits is 82944, while the sum is 38.

The square root of 8441321663 is about 91876.6654978292. The cubic root of 8441321663 is about 2036.1205316630.

The spelling of 8441321663 in words is "eight billion, four hundred forty-one million, three hundred twenty-one thousand, six hundred sixty-three".