9996757776 has 80 divisors (see below), whose sum is σ = 28722566400. Its totient is φ = 3328981632.

The previous prime is 9996757759. The next prime is 9996757817. The reversal of 9996757776 is 6777576999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450985 + ... + 472631.

It is an arithmetic number, because the mean of its divisors is an integer number (359032080).

Almost surely, 2^9996757776 is an apocalyptic number.

9996757776 is the 57726-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9996757776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14361283200).

9996757776 is an abundant number, since it is smaller than the sum of its proper divisors (18725808624).

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

9996757776 is a wasteful number, since it uses less digits than its factorization.

9996757776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22733 (or 22721 counting only the distinct ones).

The product of its digits is 315059220, while the sum is 72.

The square root of 9996757776 is about 99983.7875657849. The cubic root of 9996757776 is about 2154.2018262016.

The spelling of 9996757776 in words is "nine billion, nine hundred ninety-six million, seven hundred fifty-seven thousand, seven hundred seventy-six".