501661707020 has 24 divisors (see below), whose sum is σ = 1054828232304. Its totient is φ = 200409702336.

The previous prime is 501661707013. The next prime is 501661707047. The reversal of 501661707020 is 20707166105.

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, 15920147 + ... + 15951626.

It is an arithmetic number, because the mean of its divisors is an integer number (43951176346).

Almost surely, 2^501661707020 is an apocalyptic number.

It is an amenable number.

501661707020 is an abundant number, since it is smaller than the sum of its proper divisors (553166525284).

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

501661707020 is a wasteful number, since it uses less digits than its factorization.

501661707020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31872569 (or 31872567 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 501661707020 in words is "five hundred one billion, six hundred sixty-one million, seven hundred seven thousand, twenty".