6606591 has 16 divisors (see below), whose sum is σ = 9380448. Its totient is φ = 4121600.

The previous prime is 6606581. The next prime is 6606629. The reversal of 6606591 is 1956066.

It is a cyclic number.

It is not a de Polignac number, because 6606591 - 2⁶ = 6606527 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14101 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (586278).

Almost surely, 2^6606591 is an apocalyptic number.

6606591 is a deficient number, since it is larger than the sum of its proper divisors (2773857).

6606591 is a wasteful number, since it uses less digits than its factorization.

6606591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6606591 is about 2570.3289672725. The cubic root of 6606591 is about 187.6401654156.

The spelling of 6606591 in words is "six million, six hundred six thousand, five hundred ninety-one".