166322581296 has 80 divisors (see below), whose sum is σ = 444757173600. Its totient is φ = 53496059904.

The previous prime is 166322581291. The next prime is 166322581303. The reversal of 166322581296 is 692185223661.

It is a happy number.

166322581296 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166322581291) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2270490 + ... + 2342598.

It is an arithmetic number, because the mean of its divisors is an integer number (5559464670).

Almost surely, 2^166322581296 is an apocalyptic number.

166322581296 is a gapful number since it is divisible by the number (16) 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 166322581296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222378586800).

166322581296 is an abundant number, since it is smaller than the sum of its proper divisors (278434592304).

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

166322581296 is a wasteful number, since it uses less digits than its factorization.

166322581296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73806 (or 73800 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The spelling of 166322581296 in words is "one hundred sixty-six billion, three hundred twenty-two million, five hundred eighty-one thousand, two hundred ninety-six".