66442204 has 12 divisors (see below), whose sum is σ = 116917528. Its totient is φ = 33037200.

The previous prime is 66442199. The next prime is 66442217. The reversal of 66442204 is 40224466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45162 + ... + 46609.

Almost surely, 2^66442204 is an apocalyptic number.

It is an amenable number.

66442204 is a deficient number, since it is larger than the sum of its proper divisors (50475324).

66442204 is a wasteful number, since it uses less digits than its factorization.

66442204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91956 (or 91954 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 66442204 is about 8151.2087447200. The cubic root of 66442204 is about 405.0245455834.

It can be divided in two parts, 66 and 442204, that added together give a triangular number (442270 = T₉₄₀).

The spelling of 66442204 in words is "sixty-six million, four hundred forty-two thousand, two hundred four".