52661 has 4 divisors (see below), whose sum is σ = 60192. Its totient is φ = 45132.

The previous prime is 52639. The next prime is 52667. The reversal of 52661 is 16625.

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.

It is a cyclic number.

It is not a de Polignac number, because 52661 - 2¹⁰ = 51637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52667) 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, 3755 + ... + 3768.

It is an arithmetic number, because the mean of its divisors is an integer number (15048).

2⁵²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

52661 is a deficient number, since it is larger than the sum of its proper divisors (7531).

52661 is an equidigital number, since it uses as much as digits as its factorization.

52661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530.

The product of its digits is 360, while the sum is 20.

The square root of 52661 is about 229.4798466097. The cubic root of 52661 is about 37.4825993344.

The spelling of 52661 in words is "fifty-two thousand, six hundred sixty-one".