9967912807772 has 12 divisors (see below), whose sum is σ = 17739505844760. Its totient is φ = 4899482566416.

The previous prime is 9967912807759. The next prime is 9967912807799. The reversal of 9967912807772 is 2777082197699.

It is a self number, because there is not a number n which added to its sum of digits gives 9967912807772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21118459103 + ... + 21118459574.

It is an arithmetic number, because the mean of its divisors is an integer number (1478292153730).

Almost surely, 2^{9967912807772} is an apocalyptic number.

It is an amenable number.

9967912807772 is a deficient number, since it is larger than the sum of its proper divisors (7771593036988).

9967912807772 is a wasteful number, since it uses less digits than its factorization.

9967912807772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42236918740 (or 42236918738 counting only the distinct ones).

The product of its (nonzero) digits is 336063168, while the sum is 74.

The spelling of 9967912807772 in words is "nine trillion, nine hundred sixty-seven billion, nine hundred twelve million, eight hundred seven thousand, seven hundred seventy-two".