6166555565 has 24 divisors (see below), whose sum is σ = 7569313920. Its totient is φ = 4822735424.

The previous prime is 6166555559. The next prime is 6166555601. The reversal of 6166555565 is 5655556616.

It is not a de Polignac number, because 6166555565 - 2⁶ = 6166555501 is a prime.

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, 5041544 + ... + 5042766.

It is an arithmetic number, because the mean of its divisors is an integer number (315388080).

Almost surely, 2^6166555565 is an apocalyptic number.

It is an amenable number.

6166555565 is a deficient number, since it is larger than the sum of its proper divisors (1402758355).

6166555565 is a wasteful number, since it uses less digits than its factorization.

6166555565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1640 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 50.

The square root of 6166555565 is about 78527.4191922796. The cubic root of 6166555565 is about 1833.7813423208.

The spelling of 6166555565 in words is "six billion, one hundred sixty-six million, five hundred fifty-five thousand, five hundred sixty-five".