501220166 has 16 divisors (see below), whose sum is σ = 789369840. Its totient is φ = 238355040.

The previous prime is 501220147. The next prime is 501220193. The reversal of 501220166 is 661022105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60605 + ... + 68376.

It is an arithmetic number, because the mean of its divisors is an integer number (49335615).

Almost surely, 2^501220166 is an apocalyptic number.

501220166 is a deficient number, since it is larger than the sum of its proper divisors (288149674).

501220166 is a wasteful number, since it uses less digits than its factorization.

501220166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129079.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 501220166 is about 22387.9468911287. The cubic root of 501220166 is about 794.3456324410.

The spelling of 501220166 in words is "five hundred one million, two hundred twenty thousand, one hundred sixty-six".