12166200640 has 112 divisors (see below), whose sum is σ = 32694554880. Its totient is φ = 4271482880.

The previous prime is 12166200619. The next prime is 12166200643. The reversal of 12166200640 is 4600266121.

It is a junction number, because it is equal to n+sod(n) for n = 12166200599 and 12166200608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166200643) 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, 42489 + ... + 161671.

Almost surely, 2^12166200640 is an apocalyptic number.

12166200640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12166200640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16347277440).

12166200640 is an abundant number, since it is smaller than the sum of its proper divisors (20528354240).

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

12166200640 is a wasteful number, since it uses less digits than its factorization.

12166200640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119240 (or 119230 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 12166200640 its reverse (4600266121), we get a palindrome (16766466761).

The spelling of 12166200640 in words is "twelve billion, one hundred sixty-six million, two hundred thousand, six hundred forty".