666259 has 8 divisors (see below), whose sum is σ = 746928. Its totient is φ = 588960.

The previous prime is 666233. The next prime is 666269. The reversal of 666259 is 952666.

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

It is a cyclic number.

It is not a de Polignac number, because 666259 - 2⁹ = 665747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666229) 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, 412 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (93366).

2⁶⁶⁶²⁵⁹ is an apocalyptic number.

666259 is a deficient number, since it is larger than the sum of its proper divisors (80669).

666259 is a wasteful number, since it uses less digits than its factorization.

666259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685.

The product of its digits is 19440, while the sum is 34.

The square root of 666259 is about 816.2468989221. The cubic root of 666259 is about 87.3402363610.

The spelling of 666259 in words is "six hundred sixty-six thousand, two hundred fifty-nine".