66198824 has 16 divisors (see below), whose sum is σ = 124377120. Its totient is φ = 33031600.

The previous prime is 66198817. The next prime is 66198829. The reversal of 66198824 is 42889166.

It is a happy number.

66198824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66198829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4202 + ... + 12249.

It is an arithmetic number, because the mean of its divisors is an integer number (7773570).

Almost surely, 2^66198824 is an apocalyptic number.

It is an amenable number.

66198824 is a deficient number, since it is larger than the sum of its proper divisors (58178296).

66198824 is a wasteful number, since it uses less digits than its factorization.

66198824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16960 (or 16956 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 66198824 is about 8136.2659740203. The cubic root of 66198824 is about 404.5294010593.

The spelling of 66198824 in words is "sixty-six million, one hundred ninety-eight thousand, eight hundred twenty-four".