166764843648 has 192 divisors, whose sum is σ = 539267863680. Its totient is φ = 49081190400.

The previous prime is 166764843643. The next prime is 166764843659. The reversal of 166764843648 is 846348467661.

It is a happy number.

166764843648 is a `hidden beast` number, since 16 + 6 + 76 + 484 + 36 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (166764843643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102373 + ... + 586523.

It is an arithmetic number, because the mean of its divisors is an integer number (2808686790).

Almost surely, 2^166764843648 is an apocalyptic number.

166764843648 is a gapful number since it is divisible by the number (18) 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 166764843648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269633931840).

166764843648 is an abundant number, since it is smaller than the sum of its proper divisors (372503020032).

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

166764843648 is a wasteful number, since it uses less digits than its factorization.

166764843648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484207 (or 484192 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 63.

The spelling of 166764843648 in words is "one hundred sixty-six billion, seven hundred sixty-four million, eight hundred forty-three thousand, six hundred forty-eight".