9930661 has 4 divisors (see below), whose sum is σ = 10694572. Its totient is φ = 9166752.

The previous prime is 9930647. The next prime is 9930667. The reversal of 9930661 is 1660399.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2608225 + 7322436 = 1615^2 + 2706^2 .

It is a cyclic number.

It is not a de Polignac number, because 9930661 - 2⁵ = 9930629 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 (9930667) 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 3 ways as a sum of consecutive naturals, for example, 381936 + ... + 381961.

It is an arithmetic number, because the mean of its divisors is an integer number (2673643).

Almost surely, 2^9930661 is an apocalyptic number.

It is an amenable number.

9930661 is a deficient number, since it is larger than the sum of its proper divisors (763911).

9930661 is a wasteful number, since it uses less digits than its factorization.

9930661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763910.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 9930661 is about 3151.2951305773. The cubic root of 9930661 is about 214.9443591369.

The spelling of 9930661 in words is "nine million, nine hundred thirty thousand, six hundred sixty-one".