66684868 has 12 divisors (see below), whose sum is σ = 118676880. Its totient is φ = 32777192.

The previous prime is 66684859. The next prime is 66684883. The reversal of 66684868 is 86848666.

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, 141046 + ... + 141517.

It is an arithmetic number, because the mean of its divisors is an integer number (9889740).

Almost surely, 2^66684868 is an apocalyptic number.

It is an amenable number.

66684868 is a deficient number, since it is larger than the sum of its proper divisors (51992012).

66684868 is a wasteful number, since it uses less digits than its factorization.

66684868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282626 (or 282624 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The square root of 66684868 is about 8166.0803326933. The cubic root of 66684868 is about 405.5170310758.

The spelling of 66684868 in words is "sixty-six million, six hundred eighty-four thousand, eight hundred sixty-eight".