9966655240 has 64 divisors (see below), whose sum is σ = 23335646400. Its totient is φ = 3827910912.

The previous prime is 9966655213. The next prime is 9966655249. The reversal of 9966655240 is 425566699.

It is not an unprimeable number, because it can be changed into a prime (9966655249) 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 15 ways as a sum of consecutive naturals, for example, 52374 + ... + 150586.

It is an arithmetic number, because the mean of its divisors is an integer number (364619475).

Almost surely, 2^9966655240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9966655240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11667823200).

9966655240 is an abundant number, since it is smaller than the sum of its proper divisors (13368991160).

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

9966655240 is a wasteful number, since it uses less digits than its factorization.

9966655240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98326 (or 98322 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 52.

The square root of 9966655240 is about 99833.1369836689. The cubic root of 9966655240 is about 2152.0373865480.

The spelling of 9966655240 in words is "nine billion, nine hundred sixty-six million, six hundred fifty-five thousand, two hundred forty".