6666713 has 4 divisors (see below), whose sum is σ = 6735540. Its totient is φ = 6597888.

The previous prime is 6666689. The next prime is 6666719. The reversal of 6666713 is 3176666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3176666 = 2 ⋅1588333.

It can be written as a sum of positive squares in 2 ways, for example, as 3579664 + 3087049 = 1892^2 + 1757^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666713 - 2¹⁰ = 6665689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6666719) 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, 34268 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (1683885).

Almost surely, 2^6666713 is an apocalyptic number.

It is an amenable number.

6666713 is a deficient number, since it is larger than the sum of its proper divisors (68827).

6666713 is an equidigital number, since it uses as much as digits as its factorization.

6666713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68826.

The product of its digits is 27216, while the sum is 35.

The square root of 6666713 is about 2581.9978698674. The cubic root of 6666713 is about 188.2076417886.

The spelling of 6666713 in words is "six million, six hundred sixty-six thousand, seven hundred thirteen".