66030208 has 16 divisors (see below), whose sum is σ = 131544810. Its totient is φ = 33015040.

The previous prime is 66030119. The next prime is 66030229. The reversal of 66030208 is 80203066.

66030208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49449024 + 16581184 = 7032^2 + 4072^2 .

It is a tau number, because it is divible by the number of its divisors (16).

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 as a sum of consecutive naturals, namely, 257803 + ... + 258058.

Almost surely, 2^66030208 is an apocalyptic number.

It is an amenable number.

66030208 is a deficient number, since it is larger than the sum of its proper divisors (65514602).

66030208 is an equidigital number, since it uses as much as digits as its factorization.

66030208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515875 (or 515863 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 66030208 is about 8125.8973658298. The cubic root of 66030208 is about 404.1856481018.

The spelling of 66030208 in words is "sixty-six million, thirty thousand, two hundred eight".