655011660065 has 32 divisors (see below), whose sum is σ = 907485596160. Its totient is φ = 444567481344.

The previous prime is 655011660041. The next prime is 655011660073. The reversal of 655011660065 is 560066110556.

It is not a de Polignac number, because 655011660065 - 2¹⁰ = 655011659041 is a prime.

It is a super-2 number, since 2×655011660065² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3600329 + ... + 3777881.

It is an arithmetic number, because the mean of its divisors is an integer number (28358924880).

Almost surely, 2^655011660065 is an apocalyptic number.

It is an amenable number.

655011660065 is a deficient number, since it is larger than the sum of its proper divisors (252473936095).

655011660065 is a wasteful number, since it uses less digits than its factorization.

655011660065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178641.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 655011660065 in words is "six hundred fifty-five billion, eleven million, six hundred sixty thousand, sixty-five".