6679709 has 4 divisors (see below), whose sum is σ = 6728604. Its totient is φ = 6630816.

The previous prime is 6679693. The next prime is 6679723. The reversal of 6679709 is 9079766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9079766 = 2 ⋅4539883.

It can be written as a sum of positive squares in 2 ways, for example, as 2464900 + 4214809 = 1570^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 6679709 - 2⁴ = 6679693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6679709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6679789) 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, 24242 + ... + 24515.

It is an arithmetic number, because the mean of its divisors is an integer number (1682151).

Almost surely, 2^6679709 is an apocalyptic number.

It is an amenable number.

6679709 is a deficient number, since it is larger than the sum of its proper divisors (48895).

6679709 is a wasteful number, since it uses less digits than its factorization.

6679709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48894.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 6679709 is about 2584.5133004107. The cubic root of 6679709 is about 188.3298588825.

The spelling of 6679709 in words is "six million, six hundred seventy-nine thousand, seven hundred nine".