6656505 has 16 divisors (see below), whose sum is σ = 10798080. Its totient is φ = 3500928.

The previous prime is 6656497. The next prime is 6656527. The reversal of 6656505 is 5056566.

It is not a de Polignac number, because 6656505 - 2³ = 6656497 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1945 + ... + 4134.

It is an arithmetic number, because the mean of its divisors is an integer number (674880).

Almost surely, 2^6656505 is an apocalyptic number.

It is an amenable number.

6656505 is a deficient number, since it is larger than the sum of its proper divisors (4141575).

6656505 is a wasteful number, since it uses less digits than its factorization.

6656505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 6656505 is about 2580.0203487570. The cubic root of 6656505 is about 188.1115322051. Note that the first 3 decimals are identical.

The spelling of 6656505 in words is "six million, six hundred fifty-six thousand, five hundred five".