45665 has 4 divisors (see below), whose sum is σ = 54804. Its totient is φ = 36528.

The previous prime is 45659. The next prime is 45667. The reversal of 45665 is 56654.

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 26896 + 18769 = 164^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 45665 - 2¹⁰ = 44641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45667) 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, 4562 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (13701).

2⁴⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

45665 is a deficient number, since it is larger than the sum of its proper divisors (9139).

45665 is an equidigital number, since it uses as much as digits as its factorization.

45665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138.

The product of its digits is 3600, while the sum is 26.

The square root of 45665 is about 213.6937060374. The cubic root of 45665 is about 35.7432869199.

The spelling of 45665 in words is "forty-five thousand, six hundred sixty-five".