45661 has 8 divisors (see below), whose sum is σ = 57024. Its totient is φ = 35520.

The previous prime is 45659. The next prime is 45667. The reversal of 45661 is 16654.

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 45661 - 2¹ = 45659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 373.

It is an arithmetic number, because the mean of its divisors is an integer number (7128).

2⁴⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

45661 is a deficient number, since it is larger than the sum of its proper divisors (11363).

45661 is a wasteful number, since it uses less digits than its factorization.

45661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its digits is 720, while the sum is 22.

The square root of 45661 is about 213.6843466424. The cubic root of 45661 is about 35.7422432517.

It can be divided in two parts, 4 and 5661, that added together give a palindrome (5665).

The spelling of 45661 in words is "forty-five thousand, six hundred sixty-one".