66895 has 8 divisors (see below), whose sum is σ = 85104. Its totient is φ = 50304.

The previous prime is 66889. The next prime is 66919. The reversal of 66895 is 59866.

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

It is a cyclic number.

It is not a de Polignac number, because 66895 - 2⁵ = 66863 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 9 and base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 66895.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 478.

It is an arithmetic number, because the mean of its divisors is an integer number (10638).

2⁶⁶⁸⁹⁵ is an apocalyptic number.

66895 is a deficient number, since it is larger than the sum of its proper divisors (18209).

66895 is a wasteful number, since it uses less digits than its factorization.

66895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its digits is 12960, while the sum is 34.

The square root of 66895 is about 258.6406773885. The cubic root of 66895 is about 40.5942528690.

Subtracting from 66895 its product of digits (12960), we obtain a palindrome (53935).

It can be divided in two parts, 66 and 895, that added together give a square (961 = 31²).

The spelling of 66895 in words is "sixty-six thousand, eight hundred ninety-five".