655610065 has 24 divisors (see below), whose sum is σ = 879459840. Its totient is φ = 468700320.

The previous prime is 655610051. The next prime is 655610069. The reversal of 655610065 is 560016556.

It is not a de Polignac number, because 655610065 - 2⁹ = 655609553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655610065.

It is not an unprimeable number, because it can be changed into a prime (655610069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26512 + ... + 44878.

It is an arithmetic number, because the mean of its divisors is an integer number (36644160).

Almost surely, 2^655610065 is an apocalyptic number.

It is an amenable number.

655610065 is a deficient number, since it is larger than the sum of its proper divisors (223849775).

655610065 is a wasteful number, since it uses less digits than its factorization.

655610065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18453 (or 18442 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 655610065 is about 25604.8836162167. The cubic root of 655610065 is about 868.7241019142.

The spelling of 655610065 in words is "six hundred fifty-five million, six hundred ten thousand, sixty-five".