9665849880 has 192 divisors, whose sum is σ = 32690679840. Its totient is φ = 2568609792.

The previous prime is 9665849873. The next prime is 9665849887. The reversal of 9665849880 is 889485669.

9665849880 is a `hidden beast` number, since 9 + 6 + 65 + 8 + 498 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (9665849873) and next prime (9665849887).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665849887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3079672 + ... + 3082808.

Almost surely, 2^9665849880 is an apocalyptic number.

9665849880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9665849880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16345339920).

9665849880 is an abundant number, since it is smaller than the sum of its proper divisors (23024829960).

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

9665849880 is a wasteful number, since it uses less digits than its factorization.

9665849880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480 (or 3464 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The square root of 9665849880 is about 98315.0541880540. The cubic root of 9665849880 is about 2130.1655098526.

The spelling of 9665849880 in words is "nine billion, six hundred sixty-five million, eight hundred forty-nine thousand, eight hundred eighty".