9969661 has 16 divisors (see below), whose sum is σ = 11415040. Its totient is φ = 8631360.

The previous prime is 9969653. The next prime is 9969689. The reversal of 9969661 is 1669699.

9969661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9969661 - 2³ = 9969653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9969611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44596 + ... + 44818.

It is an arithmetic number, because the mean of its divisors is an integer number (713440).

Almost surely, 2^9969661 is an apocalyptic number.

It is an amenable number.

9969661 is a deficient number, since it is larger than the sum of its proper divisors (1445379).

9969661 is a wasteful number, since it uses less digits than its factorization.

9969661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 157464, while the sum is 46.

The square root of 9969661 is about 3157.4769991245. The cubic root of 9969661 is about 215.2253703108.

The spelling of 9969661 in words is "nine million, nine hundred sixty-nine thousand, six hundred sixty-one".