59665 has 4 divisors (see below), whose sum is σ = 71604. Its totient is φ = 47728.

The previous prime is 59663. The next prime is 59669. The reversal of 59665 is 56695.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36864 + 22801 = 192^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 59665 - 2¹ = 59663 is a prime.

It is a Duffinian number.

59665 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (59663) by changing a digit.

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, 5962 + ... + 5971.

It is an arithmetic number, because the mean of its divisors is an integer number (17901).

2⁵⁹⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

59665 is a deficient number, since it is larger than the sum of its proper divisors (11939).

59665 is a wasteful number, since it uses less digits than its factorization.

59665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938.

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

The square root of 59665 is about 244.2642012248. The cubic root of 59665 is about 39.0756803522.

The spelling of 59665 in words is "fifty-nine thousand, six hundred sixty-five".