66044445 has 32 divisors (see below), whose sum is σ = 109498368. Its totient is φ = 33965568.

The previous prime is 66044443. The next prime is 66044449. The reversal of 66044445 is 54444066.

It is not a de Polignac number, because 66044445 - 2¹ = 66044443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66044443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70017 + ... + 70953.

It is an arithmetic number, because the mean of its divisors is an integer number (3421824).

Almost surely, 2^66044445 is an apocalyptic number.

It is an amenable number.

66044445 is a deficient number, since it is larger than the sum of its proper divisors (43453923).

66044445 is a wasteful number, since it uses less digits than its factorization.

66044445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 66044445 is about 8126.7733449383. The cubic root of 66044445 is about 404.2146952997.

The spelling of 66044445 in words is "sixty-six million, forty-four thousand, four hundred forty-five".