506166567481 has 4 divisors (see below), whose sum is σ = 506171123172. Its totient is φ = 506162011792.

The previous prime is 506166567469. The next prime is 506166567509. The reversal of 506166567481 is 184765661605.

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 195983290000 + 310183277481 = 442700^2 + 556941^2 .

It is a cyclic number.

It is not a de Polignac number, because 506166567481 - 2²⁹ = 505629696569 is a prime.

It is a super-2 number, since 2×506166567481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506166567451) 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, 2106910 + ... + 2334823.

It is an arithmetic number, because the mean of its divisors is an integer number (126542780793).

Almost surely, 2^506166567481 is an apocalyptic number.

It is an amenable number.

506166567481 is a deficient number, since it is larger than the sum of its proper divisors (4555691).

506166567481 is a wasteful number, since it uses less digits than its factorization.

506166567481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555690.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 506166567481 in words is "five hundred six billion, one hundred sixty-six million, five hundred sixty-seven thousand, four hundred eighty-one".