9936661 has 12 divisors (see below), whose sum is σ = 11645100. Its totient is φ = 8453760.

The previous prime is 9936649. The next prime is 9936673. The reversal of 9936661 is 1666399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9936649) and next prime (9936673).

It can be written as a sum of positive squares in 2 ways, for example, as 1416100 + 8520561 = 1190^2 + 2919^2 .

It is not a de Polignac number, because 9936661 - 2⁵ = 9936629 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 (9936611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6621 + ... + 7981.

It is an arithmetic number, because the mean of its divisors is an integer number (970425).

Almost surely, 2^9936661 is an apocalyptic number.

It is an amenable number.

9936661 is a deficient number, since it is larger than the sum of its proper divisors (1708439).

9936661 is a wasteful number, since it uses less digits than its factorization.

9936661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524 (or 1517 counting only the distinct ones).

The product of its digits is 52488, while the sum is 40.

The square root of 9936661 is about 3152.2469763646. The cubic root of 9936661 is about 214.9876394553.

The spelling of 9936661 in words is "nine million, nine hundred thirty-six thousand, six hundred sixty-one".