9978664932 has 72 divisors (see below), whose sum is σ = 25351310712. Its totient is φ = 3309465600.

The previous prime is 9978664909. The next prime is 9978664933. The reversal of 9978664932 is 2394668799.

9978664932 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 101485476 + 9877179456 = 10074^2 + 99384^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9978664932.

It is not an unprimeable number, because it can be changed into a prime (9978664933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8198788 + ... + 8200004.

Almost surely, 2^9978664932 is an apocalyptic number.

It is an amenable number.

9978664932 is an abundant number, since it is smaller than the sum of its proper divisors (15372645780).

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

9978664932 is a wasteful number, since it uses less digits than its factorization.

9978664932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2184 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The square root of 9978664932 is about 99893.2677010818. The cubic root of 9978664932 is about 2152.9014320885.

The spelling of 9978664932 in words is "nine billion, nine hundred seventy-eight million, six hundred sixty-four thousand, nine hundred thirty-two".