506166361 has 4 divisors (see below), whose sum is σ = 518511924. Its totient is φ = 493820800.

The previous prime is 506166343. The next prime is 506166391. The reversal of 506166361 is 163661605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163661605 = 5 ⋅32732321.

It can be written as a sum of positive squares in 2 ways, for example, as 6375625 + 499790736 = 2525^2 + 22356^2 .

It is a cyclic number.

It is not a de Polignac number, because 506166361 - 2⁵ = 506166329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506166391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6172720 + ... + 6172801.

It is an arithmetic number, because the mean of its divisors is an integer number (129627981).

Almost surely, 2^506166361 is an apocalyptic number.

It is an amenable number.

506166361 is a deficient number, since it is larger than the sum of its proper divisors (12345563).

506166361 is a wasteful number, since it uses less digits than its factorization.

506166361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12345562.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 506166361 is about 22498.1412787812. The cubic root of 506166361 is about 796.9500332597.

The spelling of 506166361 in words is "five hundred six million, one hundred sixty-six thousand, three hundred sixty-one".