6656505507 has 16 divisors (see below), whose sum is σ = 9862912000. Its totient is φ = 4437030312.

The previous prime is 6656505497. The next prime is 6656505523. The reversal of 6656505507 is 7055056566.

It is not a de Polignac number, because 6656505507 - 2¹⁰ = 6656504483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656505547) 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, 241794 + ... + 267912.

It is an arithmetic number, because the mean of its divisors is an integer number (616432000).

Almost surely, 2^6656505507 is an apocalyptic number.

6656505507 is a deficient number, since it is larger than the sum of its proper divisors (3206406493).

6656505507 is a wasteful number, since it uses less digits than its factorization.

6656505507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35567 (or 35561 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The square root of 6656505507 is about 81587.4102236368. The cubic root of 6656505507 is about 1881.1153698102.

The spelling of 6656505507 in words is "six billion, six hundred fifty-six million, five hundred five thousand, five hundred seven".