9666531 has 12 divisors (see below), whose sum is σ = 15957552. Its totient is φ = 5523696.

The previous prime is 9666491. The next prime is 9666533. The reversal of 9666531 is 1356669.

It is not a de Polignac number, because 9666531 - 2⁶ = 9666467 is a prime.

It is a super-2 number, since 2×9666531² = 186883643147922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9666533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76656 + ... + 76781.

It is an arithmetic number, because the mean of its divisors is an integer number (1329796).

Almost surely, 2^9666531 is an apocalyptic number.

9666531 is a deficient number, since it is larger than the sum of its proper divisors (6291021).

9666531 is a wasteful number, since it uses less digits than its factorization.

9666531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153450 (or 153447 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 9666531 is about 3109.1045334630. The cubic root of 9666531 is about 213.0215543882.

The spelling of 9666531 in words is "nine million, six hundred sixty-six thousand, five hundred thirty-one".