6601656065 has 16 divisors (see below), whose sum is σ = 7946214528. Its totient is φ = 5265202176.

The previous prime is 6601656059. The next prime is 6601656073. The reversal of 6601656065 is 5606561066.

It is a cyclic number.

It is not a de Polignac number, because 6601656065 - 2¹⁰ = 6601655041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4277684 + ... + 4279226.

It is an arithmetic number, because the mean of its divisors is an integer number (496638408).

Almost surely, 2^6601656065 is an apocalyptic number.

It is an amenable number.

6601656065 is a deficient number, since it is larger than the sum of its proper divisors (1344558463).

6601656065 is a wasteful number, since it uses less digits than its factorization.

6601656065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608.

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

The square root of 6601656065 is about 81250.5757825752. The cubic root of 6601656065 is about 1875.9343316098.

The spelling of 6601656065 in words is "six billion, six hundred one million, six hundred fifty-six thousand, sixty-five".