659666041 has 4 divisors (see below), whose sum is σ = 668957184. Its totient is φ = 650374900.

The previous prime is 659666027. The next prime is 659666069. The reversal of 659666041 is 140666956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 659666041 - 2²⁵ = 626111609 is a prime.

It is a super-2 number, since 2×659666041² = 870318571297227362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659666141) 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, 4645465 + ... + 4645606.

It is an arithmetic number, because the mean of its divisors is an integer number (167239296).

Almost surely, 2^659666041 is an apocalyptic number.

It is an amenable number.

659666041 is a deficient number, since it is larger than the sum of its proper divisors (9291143).

659666041 is an equidigital number, since it uses as much as digits as its factorization.

659666041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291142.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 659666041 is about 25683.9646666943. The cubic root of 659666041 is about 870.5118936690.

The spelling of 659666041 in words is "six hundred fifty-nine million, six hundred sixty-six thousand, forty-one".