52066561 has 4 divisors (see below), whose sum is σ = 52120512. Its totient is φ = 52012612.

The previous prime is 52066543. The next prime is 52066579. The reversal of 52066561 is 16566025.

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 an interprime number because it is at equal distance from previous prime (52066543) and next prime (52066579).

It is a cyclic number.

It is not a de Polignac number, because 52066561 - 2¹⁷ = 51935489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52066541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25501 + ... + 27466.

It is an arithmetic number, because the mean of its divisors is an integer number (13030128).

Almost surely, 2^52066561 is an apocalyptic number.

It is an amenable number.

52066561 is a deficient number, since it is larger than the sum of its proper divisors (53951).

52066561 is an equidigital number, since it uses as much as digits as its factorization.

52066561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53950.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 52066561 is about 7215.7162499644. The cubic root of 52066561 is about 373.4103039817.

It can be divided in two parts, 520 and 66561, that added together give a square (67081 = 259²).

The spelling of 52066561 in words is "fifty-two million, sixty-six thousand, five hundred sixty-one".