8646641 has 4 divisors (see below), whose sum is σ = 8880372. Its totient is φ = 8412912.

The previous prime is 8646607. The next prime is 8646667. The reversal of 8646641 is 1466468.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8151025 + 495616 = 2855^2 + 704^2 .

It is not a de Polignac number, because 8646641 - 2¹⁰ = 8645617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8676641) 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, 116810 + ... + 116883.

It is an arithmetic number, because the mean of its divisors is an integer number (2220093).

Almost surely, 2^8646641 is an apocalyptic number.

It is an amenable number.

8646641 is a deficient number, since it is larger than the sum of its proper divisors (233731).

8646641 is a wasteful number, since it uses less digits than its factorization.

8646641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233730.

The product of its digits is 27648, while the sum is 35.

The square root of 8646641 is about 2940.5171313903. The cubic root of 8646641 is about 205.2496739807.

The spelling of 8646641 in words is "eight million, six hundred forty-six thousand, six hundred forty-one".