500105661 has 16 divisors (see below), whose sum is σ = 727818048. Its totient is φ = 302931200.

The previous prime is 500105623. The next prime is 500105663. The reversal of 500105661 is 166501005.

It is not a de Polignac number, because 500105661 - 2⁶ = 500105597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500105663) 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 15 ways as a sum of consecutive naturals, for example, 91765 + ... + 97061.

It is an arithmetic number, because the mean of its divisors is an integer number (45488628).

Almost surely, 2^500105661 is an apocalyptic number.

It is an amenable number.

500105661 is a deficient number, since it is larger than the sum of its proper divisors (227712387).

500105661 is a wasteful number, since it uses less digits than its factorization.

500105661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 500105661 is about 22363.0423019767. The cubic root of 500105661 is about 793.7564308405.

Adding to 500105661 its reverse (166501005), we get a palindrome (666606666).

The spelling of 500105661 in words is "five hundred million, one hundred five thousand, six hundred sixty-one".