6671545 has 8 divisors (see below), whose sum is σ = 8036424. Its totient is φ = 5316864.

The previous prime is 6671519. The next prime is 6671549. The reversal of 6671545 is 5451766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 61504 + 6610041 = 248^2 + 2571^2 .

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 6671545 - 2⁵ = 6671513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6671545.

It is not an unprimeable number, because it can be changed into a prime (6671549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (1004553).

Almost surely, 2^6671545 is an apocalyptic number.

It is an amenable number.

6671545 is a deficient number, since it is larger than the sum of its proper divisors (1364879).

6671545 is a wasteful number, since it uses less digits than its factorization.

6671545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099.

The product of its digits is 25200, while the sum is 34.

The square root of 6671545 is about 2582.9334099043. The cubic root of 6671545 is about 188.2531014576.

The spelling of 6671545 in words is "six million, six hundred seventy-one thousand, five hundred forty-five".