9666155928 has 256 divisors, whose sum is σ = 29128458240. Its totient is φ = 2634508800.

The previous prime is 9666155923. The next prime is 9666155929. The reversal of 9666155928 is 8295516669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666155921) 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 63 ways as a sum of consecutive naturals, for example, 29202723 + ... + 29203053.

It is an arithmetic number, because the mean of its divisors is an integer number (113783040).

Almost surely, 2^9666155928 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 9666155928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14564229120).

9666155928 is an abundant number, since it is smaller than the sum of its proper divisors (19462302312).

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

9666155928 is a wasteful number, since it uses less digits than its factorization.

9666155928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 554 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 57.

The square root of 9666155928 is about 98316.6106413357. The cubic root of 9666155928 is about 2130.1879919596.

The spelling of 9666155928 in words is "nine billion, six hundred sixty-six million, one hundred fifty-five thousand, nine hundred twenty-eight".