660206165 has 16 divisors (see below), whose sum is σ = 806803200. Its totient is φ = 518486592.

The previous prime is 660206143. The next prime is 660206171. The reversal of 660206165 is 561602066.

It is a cyclic number.

It is not a de Polignac number, because 660206165 - 2¹² = 660202069 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 324371 + ... + 326399.

It is an arithmetic number, because the mean of its divisors is an integer number (50425200).

Almost surely, 2^660206165 is an apocalyptic number.

It is an amenable number.

660206165 is a deficient number, since it is larger than the sum of its proper divisors (146597035).

660206165 is a wasteful number, since it uses less digits than its factorization.

660206165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 660206165 is about 25694.4773249039. The cubic root of 660206165 is about 870.7494159245.

The spelling of 660206165 in words is "six hundred sixty million, two hundred six thousand, one hundred sixty-five".