8424665643 has 8 divisors (see below), whose sum is σ = 11236680256. Its totient is φ = 5614547400.

The previous prime is 8424665593. The next prime is 8424665647. The reversal of 8424665643 is 3465664248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8424665643 - 2³⁰ = 7350923819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8424665592 and 8424665601.

It is not an unprimeable number, because it can be changed into a prime (8424665647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463693 + ... + 481518.

It is an arithmetic number, because the mean of its divisors is an integer number (1404585032).

Almost surely, 2^8424665643 is an apocalyptic number.

8424665643 is a deficient number, since it is larger than the sum of its proper divisors (2812014613).

8424665643 is a wasteful number, since it uses less digits than its factorization.

8424665643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948185.

The product of its digits is 3317760, while the sum is 48.

The square root of 8424665643 is about 91785.9773767213. The cubic root of 8424665643 is about 2034.7804573732.

The spelling of 8424665643 in words is "eight billion, four hundred twenty-four million, six hundred sixty-five thousand, six hundred forty-three".