6656505505 has 32 divisors (see below), whose sum is σ = 9064218240. Its totient is φ = 4652121600.

The previous prime is 6656505497. The next prime is 6656505523. The reversal of 6656505505 is 5055056566.

It is not a de Polignac number, because 6656505505 - 2³ = 6656505497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1582405 + ... + 1586605.

It is an arithmetic number, because the mean of its divisors is an integer number (283256820).

Almost surely, 2^6656505505 is an apocalyptic number.

6656505505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6656505505 is a deficient number, since it is larger than the sum of its proper divisors (2407712735).

6656505505 is a wasteful number, since it uses less digits than its factorization.

6656505505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 675000, while the sum is 43.

The square root of 6656505505 is about 81587.4102113800. The cubic root of 6656505505 is about 1881.1153696218.

The spelling of 6656505505 in words is "six billion, six hundred fifty-six million, five hundred five thousand, five hundred five".