66005684 has 12 divisors (see below), whose sum is σ = 115827264. Its totient is φ = 32912184.

The previous prime is 66005683. The next prime is 66005689. The reversal of 66005684 is 48650066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66005683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21014 + ... + 23949.

It is an arithmetic number, because the mean of its divisors is an integer number (9652272).

Almost surely, 2^66005684 is an apocalyptic number.

It is an amenable number.

66005684 is a deficient number, since it is larger than the sum of its proper divisors (49821580).

66005684 is a wasteful number, since it uses less digits than its factorization.

66005684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45334 (or 45332 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 66005684 is about 8124.3882231218. The cubic root of 66005684 is about 404.1356029455.

The spelling of 66005684 in words is "sixty-six million, five thousand, six hundred eighty-four".