9800661 has 16 divisors (see below), whose sum is σ = 14255360. Its totient is φ = 5952960.

The previous prime is 9800657. The next prime is 9800663. The reversal of 9800661 is 1660089.

It is not a de Polignac number, because 9800661 - 2² = 9800657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9800663) 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 in 15 ways as a sum of consecutive naturals, for example, 1491 + ... + 4671.

It is an arithmetic number, because the mean of its divisors is an integer number (890960).

Almost surely, 2^9800661 is an apocalyptic number.

It is an amenable number.

9800661 is a deficient number, since it is larger than the sum of its proper divisors (4454699).

9800661 is a wasteful number, since it uses less digits than its factorization.

9800661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 9800661 is about 3130.6007410719. The cubic root of 9800661 is about 214.0023073091.

The spelling of 9800661 in words is "nine million, eight hundred thousand, six hundred sixty-one".