655166565 has 24 divisors (see below), whose sum is σ = 1138745088. Its totient is φ = 348461280.

The previous prime is 655166563. The next prime is 655166573. The reversal of 655166565 is 565661556.

655166565 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 655166565 - 2¹ = 655166563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 655166565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655166563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3321 + ... + 36350.

It is an arithmetic number, because the mean of its divisors is an integer number (47447712).

Almost surely, 2^655166565 is an apocalyptic number.

It is an amenable number.

655166565 is a deficient number, since it is larger than the sum of its proper divisors (483578523).

655166565 is a wasteful number, since it uses less digits than its factorization.

655166565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40049 (or 40046 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The square root of 655166565 is about 25596.2216938360. The cubic root of 655166565 is about 868.5281693678.

The spelling of 655166565 in words is "six hundred fifty-five million, one hundred sixty-six thousand, five hundred sixty-five".