9666431 has 4 divisors (see below), whose sum is σ = 9700872. Its totient is φ = 9631992.

The previous prime is 9666427. The next prime is 9666457. The reversal of 9666431 is 1346669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9666431 - 2² = 9666427 is a prime.

It is a super-2 number, since 2×9666431² = 186879776555522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9666391 and 9666400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666401) 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, 16796 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (2425218).

Almost surely, 2^9666431 is an apocalyptic number.

9666431 is a deficient number, since it is larger than the sum of its proper divisors (34441).

9666431 is a wasteful number, since it uses less digits than its factorization.

9666431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34440.

The product of its digits is 23328, while the sum is 35.

The square root of 9666431 is about 3109.0884516205. The cubic root of 9666431 is about 213.0208198183.

The spelling of 9666431 in words is "nine million, six hundred sixty-six thousand, four hundred thirty-one".