4421661 has 8 divisors (see below), whose sum is σ = 6205920. Its totient is φ = 2792592.

The previous prime is 4421653. The next prime is 4421671. The reversal of 4421661 is 1661244.

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

It is not a de Polignac number, because 4421661 - 2³ = 4421653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38730 + ... + 38843.

It is an arithmetic number, because the mean of its divisors is an integer number (775740).

Almost surely, 2^4421661 is an apocalyptic number.

It is an amenable number.

4421661 is a deficient number, since it is larger than the sum of its proper divisors (1784259).

4421661 is a wasteful number, since it uses less digits than its factorization.

4421661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77595.

The product of its digits is 1152, while the sum is 24.

The square root of 4421661 is about 2102.7745956236. The cubic root of 4421661 is about 164.1327128224.

The spelling of 4421661 in words is "four million, four hundred twenty-one thousand, six hundred sixty-one".