9640566 has 64 divisors (see below), whose sum is σ = 23869440. Its totient is φ = 2864160.

The previous prime is 9640549. The next prime is 9640577. The reversal of 9640566 is 6650469.

It is a happy number.

9640566 is a `hidden beast` number, since 9 + 640 + 5 + 6 + 6 = 666.

9640566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9640566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21541 + ... + 21983.

It is an arithmetic number, because the mean of its divisors is an integer number (372960).

Almost surely, 2^9640566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9640566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11934720).

9640566 is an abundant number, since it is smaller than the sum of its proper divisors (14228874).

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

9640566 is a wasteful number, since it uses less digits than its factorization.

9640566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 9640566 is about 3104.9260860768. The cubic root of 9640566 is about 212.8306529373.

The spelling of 9640566 in words is "nine million, six hundred forty thousand, five hundred sixty-six".