9691666 has 8 divisors (see below), whose sum is σ = 15392700. Its totient is φ = 4560768.

The previous prime is 9691639. The next prime is 9691673. The reversal of 9691666 is 6661969.

It can be written as a sum of positive squares in 2 ways, for example, as 7812025 + 1879641 = 2795^2 + 1371^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142491 + ... + 142558.

Almost surely, 2^9691666 is an apocalyptic number.

9691666 is a deficient number, since it is larger than the sum of its proper divisors (5701034).

9691666 is a wasteful number, since it uses less digits than its factorization.

9691666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285068.

The product of its digits is 104976, while the sum is 43.

The square root of 9691666 is about 3113.1440699075. The cubic root of 9691666 is about 213.2060281047.

The spelling of 9691666 in words is "nine million, six hundred ninety-one thousand, six hundred sixty-six".