506166197 has 4 divisors (see below), whose sum is σ = 518511756. Its totient is φ = 493820640.

The previous prime is 506166187. The next prime is 506166209. The reversal of 506166197 is 791661605.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177795556 + 328370641 = 13334^2 + 18121^2 .

It is a cyclic number.

It is not a de Polignac number, because 506166197 - 2⁴ = 506166181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 12345517 = 506166197 / (5 + 0 + 6 + 1 + 6 + 6 + 1 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506166107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6172718 + ... + 6172799.

It is an arithmetic number, because the mean of its divisors is an integer number (129627939).

Almost surely, 2^506166197 is an apocalyptic number.

It is an amenable number.

506166197 is a deficient number, since it is larger than the sum of its proper divisors (12345559).

506166197 is a wasteful number, since it uses less digits than its factorization.

506166197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12345558.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 506166197 is about 22498.1376340354. The cubic root of 506166197 is about 796.9499471880.

The spelling of 506166197 in words is "five hundred six million, one hundred sixty-six thousand, one hundred ninety-seven".