12166650420 has 48 divisors (see below), whose sum is σ = 34156570560. Its totient is φ = 3235873536.

The previous prime is 12166650359. The next prime is 12166650427. The reversal of 12166650420 is 2405666121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166650427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244777 + ... + 290256.

It is an arithmetic number, because the mean of its divisors is an integer number (711595220).

Almost surely, 2^12166650420 is an apocalyptic number.

12166650420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12166650420 is an abundant number, since it is smaller than the sum of its proper divisors (21989920140).

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

12166650420 is a wasteful number, since it uses less digits than its factorization.

12166650420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535424 (or 535422 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 12166650420 in words is "twelve billion, one hundred sixty-six million, six hundred fifty thousand, four hundred twenty".