6661655000605 has 24 divisors (see below), whose sum is σ = 8952566308056. Its totient is φ = 4753427902080.

The previous prime is 6661655000593. The next prime is 6661655000677. The reversal of 6661655000605 is 5060005561666.

It can be written as a sum of positive squares in 4 ways, for example, as 1160969615289 + 5500685385316 = 1077483^2 + 2345354^2 .

It is not a de Polignac number, because 6661655000605 - 2⁵ = 6661655000573 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 23 ways as a sum of consecutive naturals, for example, 103845294 + ... + 103909423.

It is an arithmetic number, because the mean of its divisors is an integer number (373023596169).

Almost surely, 2^{6661655000605} is an apocalyptic number.

It is an amenable number.

6661655000605 is a deficient number, since it is larger than the sum of its proper divisors (2290911307451).

6661655000605 is a wasteful number, since it uses less digits than its factorization.

6661655000605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207754797 (or 207754786 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 6661655000605 in words is "six trillion, six hundred sixty-one billion, six hundred fifty-five million, six hundred five", and thus it is an aban number.