9955661 has 8 divisors (see below), whose sum is σ = 10437504. Its totient is φ = 9485280.

The previous prime is 9955651. The next prime is 9955697. The reversal of 9955661 is 1665599.

9955661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9955661 - 2¹⁴ = 9939277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9955651) 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, 1061 + ... + 4586.

It is an arithmetic number, because the mean of its divisors is an integer number (1304688).

Almost surely, 2^9955661 is an apocalyptic number.

It is an amenable number.

9955661 is a deficient number, since it is larger than the sum of its proper divisors (481843).

9955661 is a wasteful number, since it uses less digits than its factorization.

9955661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731.

The product of its digits is 72900, while the sum is 41.

The square root of 9955661 is about 3155.2592603461. The cubic root of 9955661 is about 215.1245789632.

The spelling of 9955661 in words is "nine million, nine hundred fifty-five thousand, six hundred sixty-one".