9966489438329 has 4 divisors (see below), whose sum is σ = 9966501354384. Its totient is φ = 9966477522276.

The previous prime is 9966489438287. The next prime is 9966489438341. The reversal of 9966489438329 is 9238349846699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9966489438329 - 2³⁶ = 9897769961593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9966489438379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600307 + ... + 6410600.

It is an arithmetic number, because the mean of its divisors is an integer number (2491625338596).

Almost surely, 2^{9966489438329} is an apocalyptic number.

It is an amenable number.

9966489438329 is a deficient number, since it is larger than the sum of its proper divisors (11916055).

9966489438329 is a wasteful number, since it uses less digits than its factorization.

9966489438329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11916054.

The product of its digits is 4353564672, while the sum is 80.

The spelling of 9966489438329 in words is "nine trillion, nine hundred sixty-six billion, four hundred eighty-nine million, four hundred thirty-eight thousand, three hundred twenty-nine".