9967216780 has 12 divisors (see below), whose sum is σ = 20931155280. Its totient is φ = 3986886704.

The previous prime is 9967216703. The next prime is 9967216823. The reversal of 9967216780 is 876127699.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249180400 + ... + 249180439.

It is an arithmetic number, because the mean of its divisors is an integer number (1744262940).

Almost surely, 2^9967216780 is an apocalyptic number.

It is an amenable number.

9967216780 is an abundant number, since it is smaller than the sum of its proper divisors (10963938500).

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

9967216780 is a wasteful number, since it uses less digits than its factorization.

9967216780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498360848 (or 498360846 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 9967216780 is about 99835.9493368997. The cubic root of 9967216780 is about 2152.0778023930.

The spelling of 9967216780 in words is "nine billion, nine hundred sixty-seven million, two hundred sixteen thousand, seven hundred eighty".