66508 has 12 divisors (see below), whose sum is σ = 125440. Its totient is φ = 30672.

The previous prime is 66499. The next prime is 66509. The reversal of 66508 is 80566.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66509) by changing a digit.

66508 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588 + ... + 691.

2⁶⁶⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

66508 is a deficient number, since it is larger than the sum of its proper divisors (58932).

66508 is a wasteful number, since it uses less digits than its factorization.

66508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66508 is about 257.8914500328. The cubic root of 66508 is about 40.5158196595.

The spelling of 66508 in words is "sixty-six thousand, five hundred eight".