6656555616 has 48 divisors (see below), whose sum is σ = 17515069488. Its totient is φ = 2213568000.

The previous prime is 6656555599. The next prime is 6656555623. The reversal of 6656555616 is 6165556566.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×6656555616² = 88619465337802278912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41935 + ... + 122766.

It is an arithmetic number, because the mean of its divisors is an integer number (364897281).

Almost surely, 2^6656555616 is an apocalyptic number.

It is an amenable number.

6656555616 is an abundant number, since it is smaller than the sum of its proper divisors (10858513872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6656555616 is a wasteful number, since it uses less digits than its factorization.

6656555616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165135 (or 165127 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 51.

The square root of 6656555616 is about 81587.7173108796. The cubic root of 6656555616 is about 1881.1200900333.

The spelling of 6656555616 in words is "six billion, six hundred fifty-six million, five hundred fifty-five thousand, six hundred sixteen".