66442444 has 6 divisors (see below), whose sum is σ = 116274284. Its totient is φ = 33221220.

The previous prime is 66442433. The next prime is 66442471. The reversal of 66442444 is 44424466.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305302 + ... + 8305309.

Almost surely, 2^66442444 is an apocalyptic number.

It is an amenable number.

66442444 is a deficient number, since it is larger than the sum of its proper divisors (49831840).

66442444 is a wasteful number, since it uses less digits than its factorization.

66442444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610615 (or 16610613 counting only the distinct ones).

The product of its digits is 73728, while the sum is 34.

The square root of 66442444 is about 8151.2234664497. The cubic root of 66442444 is about 405.0250332543.

The spelling of 66442444 in words is "sixty-six million, four hundred forty-two thousand, four hundred forty-four".