6665759 has 4 divisors (see below), whose sum is σ = 6676800. Its totient is φ = 6654720.

The previous prime is 6665741. The next prime is 6665773. The reversal of 6665759 is 9575666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9575666 = 2 ⋅4787833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665759 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 (6665719) 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, 4559 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (1669200).

Almost surely, 2^6665759 is an apocalyptic number.

6665759 is a deficient number, since it is larger than the sum of its proper divisors (11041).

6665759 is a wasteful number, since it uses less digits than its factorization.

6665759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11040.

The product of its digits is 340200, while the sum is 44.

The square root of 6665759 is about 2581.8131225943. The cubic root of 6665759 is about 188.1986639182.

The spelling of 6665759 in words is "six million, six hundred sixty-five thousand, seven hundred fifty-nine".