6678149 has 4 divisors (see below), whose sum is σ = 6908460. Its totient is φ = 6447840.

The previous prime is 6678143. The next prime is 6678157. The reversal of 6678149 is 9418766.

6678149 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4060225 + 2617924 = 2015^2 + 1618^2 .

It is a cyclic number.

It is not a de Polignac number, because 6678149 - 2⁸ = 6677893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678143) 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, 115112 + ... + 115169.

It is an arithmetic number, because the mean of its divisors is an integer number (1727115).

Almost surely, 2^6678149 is an apocalyptic number.

It is an amenable number.

6678149 is a deficient number, since it is larger than the sum of its proper divisors (230311).

6678149 is a wasteful number, since it uses less digits than its factorization.

6678149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230310.

The product of its digits is 72576, while the sum is 41.

The square root of 6678149 is about 2584.2114851536. The cubic root of 6678149 is about 188.3151966942.

The spelling of 6678149 in words is "six million, six hundred seventy-eight thousand, one hundred forty-nine".