6679399 has 4 divisors (see below), whose sum is σ = 6701464. Its totient is φ = 6657336.

The previous prime is 6679397. The next prime is 6679423. The reversal of 6679399 is 9939766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9939766 = 2 ⋅4969883.

It is a cyclic number.

It is not a de Polignac number, because 6679399 - 2¹ = 6679397 is a prime.

It is a super-2 number, since 2×6679399² = 89228742002402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6679391) 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, 10572 + ... + 11185.

It is an arithmetic number, because the mean of its divisors is an integer number (1675366).

Almost surely, 2^6679399 is an apocalyptic number.

6679399 is a deficient number, since it is larger than the sum of its proper divisors (22065).

6679399 is a wasteful number, since it uses less digits than its factorization.

6679399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22064.

The product of its digits is 551124, while the sum is 49.

The square root of 6679399 is about 2584.4533271081. The cubic root of 6679399 is about 188.3269454243.

The spelling of 6679399 in words is "six million, six hundred seventy-nine thousand, three hundred ninety-nine".