9664725 has 48 divisors (see below), whose sum is σ = 18748800. Its totient is φ = 4300800.

The previous prime is 9664717. The next prime is 9664727. The reversal of 9664725 is 5274669.

It is not a de Polignac number, because 9664725 - 2³ = 9664717 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664727) 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 47 ways as a sum of consecutive naturals, for example, 21301 + ... + 21749.

It is an arithmetic number, because the mean of its divisors is an integer number (390600).

Almost surely, 2^9664725 is an apocalyptic number.

It is an amenable number.

9664725 is a deficient number, since it is larger than the sum of its proper divisors (9084075).

9664725 is a wasteful number, since it uses less digits than its factorization.

9664725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 505 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 9664725 is about 3108.8140825723. The cubic root of 9664725 is about 213.0082872748.

The spelling of 9664725 in words is "nine million, six hundred sixty-four thousand, seven hundred twenty-five".