6618849 has 4 divisors (see below), whose sum is σ = 8825136. Its totient is φ = 4412564.

The previous prime is 6618839. The next prime is 6618851. The reversal of 6618849 is 9488166.

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 a de Polignac number, because none of the positive numbers 2^k-6618849 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6618849.

It is not an unprimeable number, because it can be changed into a prime (6618809) 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, 1103139 + ... + 1103144.

It is an arithmetic number, because the mean of its divisors is an integer number (2206284).

Almost surely, 2^6618849 is an apocalyptic number.

It is an amenable number.

6618849 is a deficient number, since it is larger than the sum of its proper divisors (2206287).

6618849 is a wasteful number, since it uses less digits than its factorization.

6618849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206286.

The product of its digits is 82944, while the sum is 42.

The square root of 6618849 is about 2572.7123819036. The cubic root of 6618849 is about 187.7561441438.

It can be divided in two parts, 66 and 18849, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 6618849 in words is "six million, six hundred eighteen thousand, eight hundred forty-nine".