166243123200 has 1080 divisors, whose sum is σ = 700349799744. Its totient is φ = 34406400000.

The previous prime is 166243123177. The next prime is 166243123201. The reversal of 166243123200 is 2321342661.

It is a super-2 number, since 2×166243123200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (166243123201) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 662323075 + ... + 662323325.

Almost surely, 2^166243123200 is an apocalyptic number.

166243123200 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 166243123200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350174899872).

166243123200 is an abundant number, since it is smaller than the sum of its proper divisors (534106676544).

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

166243123200 is a wasteful number, since it uses less digits than its factorization.

166243123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 166243123200 its reverse (2321342661), we get a palindrome (168564465861).

The spelling of 166243123200 in words is "one hundred sixty-six billion, two hundred forty-three million, one hundred twenty-three thousand, two hundred".