66203828 has 12 divisors (see below), whose sum is σ = 121954560. Its totient is φ = 31359672.

The previous prime is 66203801. The next prime is 66203833. The reversal of 66203828 is 82830266.

66203828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 435476 + ... + 435627.

It is an arithmetic number, because the mean of its divisors is an integer number (10162880).

Almost surely, 2^66203828 is an apocalyptic number.

It is an amenable number.

66203828 is a deficient number, since it is larger than the sum of its proper divisors (55750732).

66203828 is a wasteful number, since it uses less digits than its factorization.

66203828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871126 (or 871124 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 66203828 is about 8136.5734802803. The cubic root of 66203828 is about 404.5395936578.

The spelling of 66203828 in words is "sixty-six million, two hundred three thousand, eight hundred twenty-eight".