4491665018 has 32 divisors (see below), whose sum is σ = 7344691200. Its totient is φ = 2053051056.

The previous prime is 4491665011. The next prime is 4491665021. The reversal of 4491665018 is 8105661944.

It is a self number, because there is not a number n which added to its sum of digits gives 4491665018.

It is not an unprimeable number, because it can be changed into a prime (4491665011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119063 + ... + 152181.

It is an arithmetic number, because the mean of its divisors is an integer number (229521600).

Almost surely, 2^4491665018 is an apocalyptic number.

4491665018 is a deficient number, since it is larger than the sum of its proper divisors (2853026182).

4491665018 is a wasteful number, since it uses less digits than its factorization.

4491665018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33266.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 4491665018 is about 67019.8852431127. The cubic root of 4491665018 is about 1649.9436794979.

The spelling of 4491665018 in words is "four billion, four hundred ninety-one million, six hundred sixty-five thousand, eighteen".