66442203 has 6 divisors (see below), whose sum is σ = 95972084. Its totient is φ = 44294796.

The previous prime is 66442199. The next prime is 66442217. The reversal of 66442203 is 30224466.

It is not a de Polignac number, because 66442203 - 2² = 66442199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66442253) 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 5 ways as a sum of consecutive naturals, for example, 3691225 + ... + 3691242.

Almost surely, 2^66442203 is an apocalyptic number.

66442203 is a deficient number, since it is larger than the sum of its proper divisors (29529881).

66442203 is a wasteful number, since it uses less digits than its factorization.

66442203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7382473 (or 7382470 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66442203 is about 8151.2086833794. The cubic root of 66442203 is about 405.0245435515.

Adding to 66442203 its reverse (30224466), we get a palindrome (96666669).

The spelling of 66442203 in words is "sixty-six million, four hundred forty-two thousand, two hundred three".