650661056165 has 16 divisors (see below), whose sum is σ = 785723243760. Its totient is φ = 517246709760.

The previous prime is 650661056099. The next prime is 650661056203. The reversal of 650661056165 is 561650166056.

It can be written as a sum of positive squares in 8 ways, for example, as 133252741444 + 517408314721 = 365038^2 + 719311^2 .

It is not a de Polignac number, because 650661056165 - 2³² = 646366088869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874181 + ... + 1437189.

It is an arithmetic number, because the mean of its divisors is an integer number (49107702735).

Almost surely, 2^650661056165 is an apocalyptic number.

It is an amenable number.

650661056165 is a deficient number, since it is larger than the sum of its proper divisors (135062187595).

650661056165 is a wasteful number, since it uses less digits than its factorization.

650661056165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564472.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 650661056165 in words is "six hundred fifty billion, six hundred sixty-one million, fifty-six thousand, one hundred sixty-five".