8641660 has 24 divisors (see below), whose sum is σ = 18421200. Its totient is φ = 3404544.

The previous prime is 8641651. The next prime is 8641669. The reversal of 8641660 is 661468.

It is an interprime number because it is at equal distance from previous prime (8641651) and next prime (8641669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8641669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885 + ... + 4564.

It is an arithmetic number, because the mean of its divisors is an integer number (767550).

Almost surely, 2^8641660 is an apocalyptic number.

It is an amenable number.

8641660 is an abundant number, since it is smaller than the sum of its proper divisors (9779540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8641660 is a wasteful number, since it uses less digits than its factorization.

8641660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6525 (or 6523 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 8641660 is about 2939.6700495124. The cubic root of 8641660 is about 205.2102542415.

The spelling of 8641660 in words is "eight million, six hundred forty-one thousand, six hundred sixty".