6659849 has 4 divisors (see below), whose sum is σ = 7611264. Its totient is φ = 5708436.

The previous prime is 6659843. The next prime is 6659893. The reversal of 6659849 is 9489566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6659849 - 2⁴ = 6659833 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6659843) 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, 475697 + ... + 475710.

It is an arithmetic number, because the mean of its divisors is an integer number (1902816).

Almost surely, 2^6659849 is an apocalyptic number.

It is an amenable number.

6659849 is a deficient number, since it is larger than the sum of its proper divisors (951415).

6659849 is an equidigital number, since it uses as much as digits as its factorization.

6659849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951414.

The product of its digits is 466560, while the sum is 47.

The square root of 6659849 is about 2580.6683242912. The cubic root of 6659849 is about 188.1430271942.

The spelling of 6659849 in words is "six million, six hundred fifty-nine thousand, eight hundred forty-nine".