54661 has 4 divisors (see below), whose sum is σ = 55872. Its totient is φ = 53452.

The previous prime is 54647. The next prime is 54667. The reversal of 54661 is 16645.

54661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16645 = 5 ⋅3329.

It is a cyclic number.

It is not a de Polignac number, because 54661 - 2⁵ = 54629 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (13968).

2⁵⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

54661 is a deficient number, since it is larger than the sum of its proper divisors (1211).

54661 is a wasteful number, since it uses less digits than its factorization.

54661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

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

The square root of 54661 is about 233.7969204245. The cubic root of 54661 is about 37.9512301401.

The spelling of 54661 in words is "fifty-four thousand, six hundred sixty-one".