650661056166 has 32 divisors (see below), whose sum is σ = 1419652718208. Its totient is φ = 197166045440.

The previous prime is 650661056099. The next prime is 650661056203. The reversal of 650661056166 is 661650166056.

It is a super-2 number, since 2×650661056166² (a number of 24 digits) contains 22 as substring.

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, 6499705 + ... + 6599051.

It is an arithmetic number, because the mean of its divisors is an integer number (44364147444).

Almost surely, 2^650661056166 is an apocalyptic number.

650661056166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

650661056166 is an abundant number, since it is smaller than the sum of its proper divisors (768991662042).

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

650661056166 is a wasteful number, since it uses less digits than its factorization.

650661056166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198596.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 650661056166 in words is "six hundred fifty billion, six hundred sixty-one million, fifty-six thousand, one hundred sixty-six".