66885568 has 28 divisors (see below), whose sum is σ = 133072632. Its totient is φ = 33355520.

The previous prime is 66885557. The next prime is 66885589. The reversal of 66885568 is 86558866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28371 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (4752594).

Almost surely, 2^66885568 is an apocalyptic number.

It is an amenable number.

66885568 is a deficient number, since it is larger than the sum of its proper divisors (66187064).

66885568 is a wasteful number, since it uses less digits than its factorization.

66885568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2730 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The square root of 66885568 is about 8178.3597377469. The cubic root of 66885568 is about 405.9234488883.

The spelling of 66885568 in words is "sixty-six million, eight hundred eighty-five thousand, five hundred sixty-eight".