9706666 has 4 divisors (see below), whose sum is σ = 14560002. Its totient is φ = 4853332.

The previous prime is 9706661. The next prime is 9706681. The reversal of 9706666 is 6666079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6666079 = 7 ⋅952297.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 275625 = 3071^2 + 525^2 .

9706666 is a modest number, since divided by 6666 gives 970 as remainder.

It is not an unprimeable number, because it can be changed into a prime (9706661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2426665 + ... + 2426668.

Almost surely, 2^9706666 is an apocalyptic number.

9706666 is a deficient number, since it is larger than the sum of its proper divisors (4853336).

9706666 is a wasteful number, since it uses less digits than its factorization.

9706666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853335.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 9706666 is about 3115.5522784893. The cubic root of 9706666 is about 213.3159659256.

The spelling of 9706666 in words is "nine million, seven hundred six thousand, six hundred sixty-six".