66044441 has 4 divisors (see below), whose sum is σ = 66090000. Its totient is φ = 65998884.

The previous prime is 66044401. The next prime is 66044443. The reversal of 66044441 is 14444066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66044441 - 2²² = 61850137 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 20531 + ... + 23528.

It is an arithmetic number, because the mean of its divisors is an integer number (16522500).

Almost surely, 2^66044441 is an apocalyptic number.

It is an amenable number.

66044441 is a deficient number, since it is larger than the sum of its proper divisors (45559).

66044441 is a wasteful number, since it uses less digits than its factorization.

66044441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45558.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 66044441 is about 8126.7730988382. The cubic root of 66044441 is about 404.2146871392.

The spelling of 66044441 in words is "sixty-six million, forty-four thousand, four hundred forty-one".