6605145 has 40 divisors (see below), whose sum is σ = 12127104. Its totient is φ = 3437856.

The previous prime is 6605119. The next prime is 6605149. The reversal of 6605145 is 5415066.

It is a happy number.

It is not a de Polignac number, because 6605145 - 2¹⁹ = 6080857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

6605145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6605149) 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 39 ways as a sum of consecutive naturals, for example, 18862 + ... + 19208.

Almost surely, 2^6605145 is an apocalyptic number.

It is an amenable number.

6605145 is a deficient number, since it is larger than the sum of its proper divisors (5521959).

6605145 is a wasteful number, since it uses less digits than its factorization.

6605145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 6605145 is about 2570.0476649276. The cubic root of 6605145 is about 187.6264746697.

The spelling of 6605145 in words is "six million, six hundred five thousand, one hundred forty-five".