9661081 has 4 divisors (see below), whose sum is σ = 10081152. Its totient is φ = 9241012.

The previous prime is 9661079. The next prime is 9661087. The reversal of 9661081 is 1801669.

It is a happy number.

9661081 is digitally balanced in base 2, 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 9661081 - 2¹ = 9661079 is a prime.

It is a super-2 number, since 2×9661081² = 186672972177122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9661087) 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, 210001 + ... + 210046.

It is an arithmetic number, because the mean of its divisors is an integer number (2520288).

Almost surely, 2^9661081 is an apocalyptic number.

It is an amenable number.

9661081 is a deficient number, since it is larger than the sum of its proper divisors (420071).

9661081 is a wasteful number, since it uses less digits than its factorization.

9661081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420070.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 9661081 is about 3108.2279517436. The cubic root of 9661081 is about 212.9815129392.

The spelling of 9661081 in words is "nine million, six hundred sixty-one thousand, eighty-one".