659966941 has 4 divisors (see below), whose sum is σ = 660143484. Its totient is φ = 659790400.

The previous prime is 659966933. The next prime is 659966959. The reversal of 659966941 is 149669956.

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

It can be written as a sum of positive squares in 2 ways, for example, as 336722500 + 323244441 = 18350^2 + 17979^2 .

It is a cyclic number.

It is not a de Polignac number, because 659966941 - 2³ = 659966933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659966981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82540 + ... + 90181.

It is an arithmetic number, because the mean of its divisors is an integer number (165035871).

Almost surely, 2^659966941 is an apocalyptic number.

It is an amenable number.

659966941 is a deficient number, since it is larger than the sum of its proper divisors (176543).

659966941 is a wasteful number, since it uses less digits than its factorization.

659966941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176542.

The product of its digits is 3149280, while the sum is 55.

The square root of 659966941 is about 25689.8217393582. The cubic root of 659966941 is about 870.6442319513.

The spelling of 659966941 in words is "six hundred fifty-nine million, nine hundred sixty-six thousand, nine hundred forty-one".