665686560222 has 16 divisors (see below), whose sum is σ = 1479303467280. Its totient is φ = 221895520056.

The previous prime is 665686560157. The next prime is 665686560257. The reversal of 665686560222 is 222065686566.

665686560222 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 8 + 6 + 5 + 602 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 12327528893 = 665686560222 / (6 + 6 + 5 + 6 + 8 + 6 + 5 + 6 + 0 + 2 + 2 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6163764393 + ... + 6163764500.

It is an arithmetic number, because the mean of its divisors is an integer number (92456466705).

Almost surely, 2^665686560222 is an apocalyptic number.

665686560222 is an abundant number, since it is smaller than the sum of its proper divisors (813616907058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665686560222 is a wasteful number, since it uses less digits than its factorization.

665686560222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12327528904 (or 12327528898 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 665686560222 in words is "six hundred sixty-five billion, six hundred eighty-six million, five hundred sixty thousand, two hundred twenty-two".