6550665656 has 8 divisors (see below), whose sum is σ = 12282498120. Its totient is φ = 3275332824.

The previous prime is 6550665647. The next prime is 6550665659. The reversal of 6550665656 is 6565660556.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6550665656² = 85822441073395820672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6550665659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409416596 + ... + 409416611.

It is an arithmetic number, because the mean of its divisors is an integer number (1535312265).

Almost surely, 2^6550665656 is an apocalyptic number.

It is an amenable number.

6550665656 is a deficient number, since it is larger than the sum of its proper divisors (5731832464).

6550665656 is a wasteful number, since it uses less digits than its factorization.

6550665656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818833213 (or 818833209 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 50.

The square root of 6550665656 is about 80936.1826132169. The cubic root of 6550665656 is about 1871.0920114801.

The spelling of 6550665656 in words is "six billion, five hundred fifty million, six hundred sixty-five thousand, six hundred fifty-six".