9641661 has 4 divisors (see below), whose sum is σ = 12855552. Its totient is φ = 6427772.

The previous prime is 9641657. The next prime is 9641741. The reversal of 9641661 is 1661469.

9641661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9641661 - 2² = 9641657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9641461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606941 + ... + 1606946.

It is an arithmetic number, because the mean of its divisors is an integer number (3213888).

Almost surely, 2^9641661 is an apocalyptic number.

It is an amenable number.

9641661 is a deficient number, since it is larger than the sum of its proper divisors (3213891).

9641661 is a wasteful number, since it uses less digits than its factorization.

9641661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213890.

The product of its digits is 7776, while the sum is 33.

The square root of 9641661 is about 3105.1024137700. The cubic root of 9641661 is about 212.8387105812.

The spelling of 9641661 in words is "nine million, six hundred forty-one thousand, six hundred sixty-one".