66143696 has 20 divisors (see below), whose sum is σ = 129700032. Its totient is φ = 32672736.

The previous prime is 66143683. The next prime is 66143713. The reversal of 66143696 is 69634166.

66143696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23576 + ... + 26231.

Almost surely, 2^66143696 is an apocalyptic number.

It is an amenable number.

66143696 is a deficient number, since it is larger than the sum of its proper divisors (63556336).

66143696 is a wasteful number, since it uses less digits than its factorization.

66143696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49898 (or 49892 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 66143696 is about 8132.8774735637. The cubic root of 66143696 is about 404.4170773612.

The spelling of 66143696 in words is "sixty-six million, one hundred forty-three thousand, six hundred ninety-six".