6679745 has 4 divisors (see below), whose sum is σ = 8015700. Its totient is φ = 5343792.

The previous prime is 6679723. The next prime is 6679747. The reversal of 6679745 is 5479766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4068289 + 2611456 = 2017^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 6679745 - 2⁶ = 6679681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6679696 and 6679705.

It is not an unprimeable number, because it can be changed into a prime (6679747) 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, 667970 + ... + 667979.

It is an arithmetic number, because the mean of its divisors is an integer number (2003925).

Almost surely, 2^6679745 is an apocalyptic number.

It is an amenable number.

6679745 is a deficient number, since it is larger than the sum of its proper divisors (1335955).

6679745 is a wasteful number, since it uses less digits than its factorization.

6679745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335954.

The product of its digits is 317520, while the sum is 44.

The square root of 6679745 is about 2584.5202649621. The cubic root of 6679745 is about 188.3301972137.

The spelling of 6679745 in words is "six million, six hundred seventy-nine thousand, seven hundred forty-five".