6678145 has 8 divisors (see below), whose sum is σ = 8046504. Its totient is φ = 5320704.

The previous prime is 6678143. The next prime is 6678157. The reversal of 6678145 is 5418766.

It can be written as a sum of positive squares in 4 ways, for example, as 2322576 + 4355569 = 1524^2 + 2087^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6678145 - 2¹ = 6678143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1314 + ... + 3883.

It is an arithmetic number, because the mean of its divisors is an integer number (1005813).

Almost surely, 2^6678145 is an apocalyptic number.

It is an amenable number.

6678145 is a deficient number, since it is larger than the sum of its proper divisors (1368359).

6678145 is a wasteful number, since it uses less digits than its factorization.

6678145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459.

The product of its digits is 40320, while the sum is 37.

The square root of 6678145 is about 2584.2107112231. The cubic root of 6678145 is about 188.3151590959.

The spelling of 6678145 in words is "six million, six hundred seventy-eight thousand, one hundred forty-five".