4421836661 has 8 divisors (see below), whose sum is σ = 4871583648. Its totient is φ = 3980050000.

The previous prime is 4421836651. The next prime is 4421836669. The reversal of 4421836661 is 1666381244.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4421836661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421836669) 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, 1988915 + ... + 1991136.

It is an arithmetic number, because the mean of its divisors is an integer number (608947956).

Almost surely, 2^4421836661 is an apocalyptic number.

It is an amenable number.

4421836661 is a deficient number, since it is larger than the sum of its proper divisors (449746987).

4421836661 is a wasteful number, since it uses less digits than its factorization.

4421836661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980163.

The product of its digits is 165888, while the sum is 41.

The square root of 4421836661 is about 66496.8921153463. The cubic root of 4421836661 is about 1641.3488631446.

It can be divided in two parts, 442183 and 6661, that added together give a palindrome (448844).

The spelling of 4421836661 in words is "four billion, four hundred twenty-one million, eight hundred thirty-six thousand, six hundred sixty-one".