501820660 has 24 divisors (see below), whose sum is σ = 1149626016. Its totient is φ = 182480160.

The previous prime is 501820639. The next prime is 501820663. The reversal of 501820660 is 66028105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501820663) 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 7 ways as a sum of consecutive naturals, for example, 1140282 + ... + 1140721.

It is an arithmetic number, because the mean of its divisors is an integer number (47901084).

Almost surely, 2^501820660 is an apocalyptic number.

It is an amenable number.

501820660 is an abundant number, since it is smaller than the sum of its proper divisors (647805356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

501820660 is a wasteful number, since it uses less digits than its factorization.

501820660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281023 (or 2281021 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 501820660 is about 22401.3539769363. The cubic root of 501820660 is about 794.6627315610.

Adding to 501820660 its reverse (66028105), we get a palindrome (567848765).

The spelling of 501820660 in words is "five hundred one million, eight hundred twenty thousand, six hundred sixty".