6664259 has 4 divisors (see below), whose sum is σ = 7616304. Its totient is φ = 5712216.

The previous prime is 6664237. The next prime is 6664261. The reversal of 6664259 is 9524666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9524666 = 2 ⋅4762333.

It is a cyclic number.

It is not a de Polignac number, because 6664259 - 2²⁰ = 5615683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664279) 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, 476012 + ... + 476025.

It is an arithmetic number, because the mean of its divisors is an integer number (1904076).

Almost surely, 2^6664259 is an apocalyptic number.

6664259 is a deficient number, since it is larger than the sum of its proper divisors (952045).

6664259 is an equidigital number, since it uses as much as digits as its factorization.

6664259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952044.

The product of its digits is 77760, while the sum is 38.

The square root of 6664259 is about 2581.5226127230. The cubic root of 6664259 is about 188.1845460373.

The spelling of 6664259 in words is "six million, six hundred sixty-four thousand, two hundred fifty-nine".