9706661 has 2 divisors, whose sum is σ = 9706662. Its totient is φ = 9706660.

The previous prime is 9706657. The next prime is 9706681. The reversal of 9706661 is 1666079.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5317636 + 4389025 = 2306^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 9706661 - 2² = 9706657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9706681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4853330 + 4853331.

It is an arithmetic number, because the mean of its divisors is an integer number (4853331).

Almost surely, 2^9706661 is an apocalyptic number.

It is an amenable number.

9706661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9706661 is an equidigital number, since it uses as much as digits as its factorization.

9706661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 9706661 is about 3115.5514760633. The cubic root of 9706661 is about 213.3159292985.

The spelling of 9706661 in words is "nine million, seven hundred six thousand, six hundred sixty-one".