9680666 has 4 divisors (see below), whose sum is σ = 14521002. Its totient is φ = 4840332.

The previous prime is 9680663. The next prime is 9680689. The reversal of 9680666 is 6660869.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6660869 = 23 ⋅289603.

It can be written as a sum of positive squares in only one way, i.e., 7678441 + 2002225 = 2771^2 + 1415^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9680663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2420165 + ... + 2420168.

Almost surely, 2^9680666 is an apocalyptic number.

9680666 is a deficient number, since it is larger than the sum of its proper divisors (4840336).

9680666 is a wasteful number, since it uses less digits than its factorization.

9680666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840335.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 9680666 is about 3111.3768656336. The cubic root of 9680666 is about 213.1253349209.

The spelling of 9680666 in words is "nine million, six hundred eighty thousand, six hundred sixty-six".