501166 has 4 divisors (see below), whose sum is σ = 751752. Its totient is φ = 250582.

The previous prime is 501157. The next prime is 501173. The reversal of 501166 is 661105.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125290 + ... + 125293.

It is an arithmetic number, because the mean of its divisors is an integer number (187938).

2⁵⁰¹¹⁶⁶ is an apocalyptic number.

501166 is a deficient number, since it is larger than the sum of its proper divisors (250586).

501166 is a wasteful number, since it uses less digits than its factorization.

501166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250585.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 501166 is about 707.9307875774. The cubic root of 501166 is about 79.4317016889.

The spelling of 501166 in words is "five hundred one thousand, one hundred sixty-six".