66485684 has 12 divisors (see below), whose sum is σ = 118322400. Its totient is φ = 32679288.

The previous prime is 66485677. The next prime is 66485717. The reversal of 66485684 is 48658466.

It is a happy number.

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, 140624 + ... + 141095.

It is an arithmetic number, because the mean of its divisors is an integer number (9860200).

Almost surely, 2^66485684 is an apocalyptic number.

It is an amenable number.

66485684 is a deficient number, since it is larger than the sum of its proper divisors (51836716).

66485684 is a wasteful number, since it uses less digits than its factorization.

66485684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281782 (or 281780 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 66485684 is about 8153.8753976254. The cubic root of 66485684 is about 405.1128761230.

The spelling of 66485684 in words is "sixty-six million, four hundred eighty-five thousand, six hundred eighty-four".