666207035565 has 8 divisors (see below), whose sum is σ = 1065931256928. Its totient is φ = 355310418960.

The previous prime is 666207035561. The next prime is 666207035617. The reversal of 666207035565 is 565530702666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666207035565 - 2² = 666207035561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666207035561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22206901171 + ... + 22206901200.

It is an arithmetic number, because the mean of its divisors is an integer number (133241407116).

Almost surely, 2^666207035565 is an apocalyptic number.

It is an amenable number.

666207035565 is a deficient number, since it is larger than the sum of its proper divisors (399724221363).

666207035565 is a wasteful number, since it uses less digits than its factorization.

666207035565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44413802379.

The product of its (nonzero) digits is 6804000, while the sum is 51.

The spelling of 666207035565 in words is "six hundred sixty-six billion, two hundred seven million, thirty-five thousand, five hundred sixty-five".