66608 has 20 divisors (see below), whose sum is σ = 135408. Its totient is φ = 31680.

The previous prime is 66601. The next prime is 66617. The reversal of 66608 is 80666.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66608.

It is not an unprimeable number, because it can be changed into a prime (66601) 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, 278 + ... + 458.

2⁶⁶⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67704).

66608 is an abundant number, since it is smaller than the sum of its proper divisors (68800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66608 is a wasteful number, since it uses less digits than its factorization.

66608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 66608 is about 258.0852572310. The cubic root of 66608 is about 40.5361157293.

The spelling of 66608 in words is "sixty-six thousand, six hundred eight".