166243255600 has 120 divisors (see below), whose sum is σ = 407849476320. Its totient is φ = 65096079360.

The previous prime is 166243255579. The next prime is 166243255613. The reversal of 166243255600 is 6552342661.

It is a happy number.

166243255600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9679821 + ... + 9696979.

It is an arithmetic number, because the mean of its divisors is an integer number (3398745636).

Almost surely, 2^166243255600 is an apocalyptic number.

166243255600 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 166243255600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203924738160).

166243255600 is an abundant number, since it is smaller than the sum of its proper divisors (241606220720).

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

166243255600 is a wasteful number, since it uses less digits than its factorization.

166243255600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687 (or 17676 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 166243255600 in words is "one hundred sixty-six billion, two hundred forty-three million, two hundred fifty-five thousand, six hundred".