6656106605 has 4 divisors (see below), whose sum is σ = 7987327932. Its totient is φ = 5324885280.

The previous prime is 6656106547. The next prime is 6656106623. The reversal of 6656106605 is 5066016566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4028313961 + 2627792644 = 63469^2 + 51262^2 .

It is not a de Polignac number, because 6656106605 - 2¹⁰ = 6656105581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665610656 + ... + 665610665.

It is an arithmetic number, because the mean of its divisors is an integer number (1996831983).

Almost surely, 2^6656106605 is an apocalyptic number.

It is an amenable number.

6656106605 is a deficient number, since it is larger than the sum of its proper divisors (1331221327).

6656106605 is a wasteful number, since it uses less digits than its factorization.

6656106605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331221326.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 6656106605 is about 81584.9655573869. The cubic root of 6656106605 is about 1881.0777927526.

The spelling of 6656106605 in words is "six billion, six hundred fifty-six million, one hundred six thousand, six hundred five".