6659577 has 10 divisors (see below), whose sum is σ = 9948378. Its totient is φ = 4439664.

The previous prime is 6659567. The next prime is 6659579. The reversal of 6659577 is 7759566.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4064256 + 2595321 = 2016^2 + 1611^2 .

It is not a de Polignac number, because 6659577 - 2⁴ = 6659561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6659579) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41028 + ... + 41189.

Almost surely, 2^6659577 is an apocalyptic number.

It is an amenable number.

6659577 is a deficient number, since it is larger than the sum of its proper divisors (3288801).

6659577 is an equidigital number, since it uses as much as digits as its factorization.

6659577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82229 (or 82220 counting only the distinct ones).

The product of its digits is 396900, while the sum is 45.

The square root of 6659577 is about 2580.6156242261. The cubic root of 6659577 is about 188.1404657947.

The spelling of 6659577 in words is "six million, six hundred fifty-nine thousand, five hundred seventy-seven".