6656346566 has 16 divisors (see below), whose sum is σ = 10636711344. Its totient is φ = 3113178624.

The previous prime is 6656346523. The next prime is 6656346647. The reversal of 6656346566 is 6656436566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594995 + ... + 606078.

It is an arithmetic number, because the mean of its divisors is an integer number (664794459).

Almost surely, 2^6656346566 is an apocalyptic number.

6656346566 is a deficient number, since it is larger than the sum of its proper divisors (3980364778).

6656346566 is a wasteful number, since it uses less digits than its factorization.

6656346566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201255.

The product of its digits is 13996800, while the sum is 53.

The square root of 6656346566 is about 81586.4361643527. The cubic root of 6656346566 is about 1881.1003975530.

Subtracting 6656346566 from its reverse (6656436566), we obtain a square (90000 = 300²).

The spelling of 6656346566 in words is "six billion, six hundred fifty-six million, three hundred forty-six thousand, five hundred sixty-six".