9907661 has 8 divisors (see below), whose sum is σ = 10178784. Its totient is φ = 9639760.

The previous prime is 9907649. The next prime is 9907663. The reversal of 9907661 is 1667099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9907661 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 (9907663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6230 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (1272348).

Almost surely, 2^9907661 is an apocalyptic number.

It is an amenable number.

9907661 is a deficient number, since it is larger than the sum of its proper divisors (271123).

9907661 is a wasteful number, since it uses less digits than its factorization.

9907661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 9907661 is about 3147.6437218974. The cubic root of 9907661 is about 214.7782895662.

The spelling of 9907661 in words is "nine million, nine hundred seven thousand, six hundred sixty-one".