659980221 has 8 divisors (see below), whose sum is σ = 896577120. Its totient is φ = 431685072.

The previous prime is 659980213. The next prime is 659980241. The reversal of 659980221 is 122089956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 659980221 - 2³ = 659980213 is a prime.

It is a super-2 number, since 2×659980221² = 871147784222417682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659980241) 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, 2075251 + ... + 2075568.

It is an arithmetic number, because the mean of its divisors is an integer number (112072140).

Almost surely, 2^659980221 is an apocalyptic number.

It is an amenable number.

659980221 is a deficient number, since it is larger than the sum of its proper divisors (236596899).

659980221 is a wasteful number, since it uses less digits than its factorization.

659980221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4150875.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 659980221 is about 25690.0802061808. The cubic root of 659980221 is about 870.6500716770.

The spelling of 659980221 in words is "six hundred fifty-nine million, nine hundred eighty thousand, two hundred twenty-one".