659983220 has 24 divisors (see below), whose sum is σ = 1492578024. Its totient is φ = 243686016.

The previous prime is 659983213. The next prime is 659983223. The reversal of 659983220 is 22389956.

It can be written as a sum of positive squares in 4 ways, for example, as 4418404 + 655564816 = 2102^2 + 25604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659983223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268939 + ... + 1269458.

It is an arithmetic number, because the mean of its divisors is an integer number (62190751).

Almost surely, 2^659983220 is an apocalyptic number.

It is an amenable number.

659983220 is an abundant number, since it is smaller than the sum of its proper divisors (832594804).

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

659983220 is a wasteful number, since it uses less digits than its factorization.

659983220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538419 (or 2538417 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 659983220 is about 25690.1385749474. The cubic root of 659983220 is about 870.6513904416.

The spelling of 659983220 in words is "six hundred fifty-nine million, nine hundred eighty-three thousand, two hundred twenty".