9946661 has 2 divisors, whose sum is σ = 9946662. Its totient is φ = 9946660.

The previous prime is 9946639. The next prime is 9946733. The reversal of 9946661 is 1666499.

9946661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8014561 + 1932100 = 2831^2 + 1390^2 .

It is an emirp because it is prime and its reverse (1666499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9946661 - 2⁶ = 9946597 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9949661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4973330 + 4973331.

It is an arithmetic number, because the mean of its divisors is an integer number (4973331).

Almost surely, 2^9946661 is an apocalyptic number.

It is an amenable number.

9946661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9946661 is an equidigital number, since it uses as much as digits as its factorization.

9946661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 9946661 is about 3153.8327476263. The cubic root of 9946661 is about 215.0597346189.

The spelling of 9946661 in words is "nine million, nine hundred forty-six thousand, six hundred sixty-one".