9966431 has 8 divisors (see below), whose sum is σ = 10775280. Its totient is φ = 9186048.

The previous prime is 9966419. The next prime is 9966433. The reversal of 9966431 is 1346699.

9966431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9966431 - 2⁶ = 9966367 is a prime.

It is a super-2 number, since 2×9966431² = 198659493755522, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6386 + ... + 7791.

It is an arithmetic number, because the mean of its divisors is an integer number (1346910).

Almost surely, 2^9966431 is an apocalyptic number.

9966431 is a deficient number, since it is larger than the sum of its proper divisors (808849).

9966431 is a wasteful number, since it uses less digits than its factorization.

9966431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14233.

The product of its digits is 34992, while the sum is 38.

The square root of 9966431 is about 3156.9654733620. The cubic root of 9966431 is about 215.2021246848.

The spelling of 9966431 in words is "nine million, nine hundred sixty-six thousand, four hundred thirty-one".