66044881 has 12 divisors (see below), whose sum is σ = 80183488. Its totient is φ = 53278272.

The previous prime is 66044879. The next prime is 66044887. The reversal of 66044881 is 18844066.

It is not a de Polignac number, because 66044881 - 2¹ = 66044879 is a prime.

It is a super-2 number, since 2×66044881² = 8723852612608322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66044881.

It is not an unprimeable number, because it can be changed into a prime (66044887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14301 + ... + 18346.

Almost surely, 2^66044881 is an apocalyptic number.

It is an amenable number.

66044881 is a deficient number, since it is larger than the sum of its proper divisors (14138607).

66044881 is a wasteful number, since it uses less digits than its factorization.

66044881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32688 (or 32671 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 66044881 is about 8126.8001698085. The cubic root of 66044881 is about 404.2155847876.

The spelling of 66044881 in words is "sixty-six million, forty-four thousand, eight hundred eighty-one".