66595 has 8 divisors (see below), whose sum is σ = 84240. Its totient is φ = 50400.

The previous prime is 66593. The next prime is 66601. The reversal of 66595 is 59566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66595 - 2¹ = 66593 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (66593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2⁶⁶⁵⁹⁵ is an apocalyptic number.

66595 is a deficient number, since it is larger than the sum of its proper divisors (17645).

66595 is a wasteful number, since it uses less digits than its factorization.

66595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 8100, while the sum is 31.

The square root of 66595 is about 258.0600705262. The cubic root of 66595 is about 40.5334783895.

Subtracting from 66595 its sum of digits (31), we obtain a square (66564 = 258²).

The spelling of 66595 in words is "sixty-six thousand, five hundred ninety-five".