66944885 has 16 divisors (see below), whose sum is σ = 96643200. Its totient is φ = 43488576.

The previous prime is 66944879. The next prime is 66944893. The reversal of 66944885 is 58844966.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66944885 - 2⁸ = 66944629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49670 + ... + 50999.

It is an arithmetic number, because the mean of its divisors is an integer number (6040200).

Almost surely, 2^66944885 is an apocalyptic number.

It is an amenable number.

66944885 is a deficient number, since it is larger than the sum of its proper divisors (29698315).

66944885 is a wasteful number, since it uses less digits than its factorization.

66944885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100700.

The product of its digits is 1658880, while the sum is 50.

The square root of 66944885 is about 8181.9853947560. The cubic root of 66944885 is about 406.0434102273.

It can be divided in two parts, 669 and 44885, that added together give a palindrome (45554).

The spelling of 66944885 in words is "sixty-six million, nine hundred forty-four thousand, eight hundred eighty-five".