66243208 has 16 divisors (see below), whose sum is σ = 127236060. Its totient is φ = 32313600.

The previous prime is 66243181. The next prime is 66243211. The reversal of 66243208 is 80234266.

66243208 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 2 ways, for example, as 49252324 + 16990884 = 7018^2 + 4122^2 .

It is a super-2 number, since 2×66243208² = 8776325212262528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66243208.

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, 100653 + ... + 101308.

Almost surely, 2^66243208 is an apocalyptic number.

It is an amenable number.

66243208 is a deficient number, since it is larger than the sum of its proper divisors (60992852).

66243208 is a wasteful number, since it uses less digits than its factorization.

66243208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202008 (or 202004 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 66243208 is about 8138.9930581123. The cubic root of 66243208 is about 404.6197884745.

The spelling of 66243208 in words is "sixty-six million, two hundred forty-three thousand, two hundred eight".