166766534528 has 128 divisors (see below), whose sum is σ = 367053120000. Its totient is φ = 74840555520.

The previous prime is 166766534509. The next prime is 166766534537. The reversal of 166766534528 is 825435667661.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×166766534528² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68150201 + ... + 68152647.

It is an arithmetic number, because the mean of its divisors is an integer number (2867602500).

Almost surely, 2^166766534528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166766534528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183526560000).

166766534528 is an abundant number, since it is smaller than the sum of its proper divisors (200286585472).

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

166766534528 is a wasteful number, since it uses less digits than its factorization.

166766534528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068 (or 3056 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 59.

The spelling of 166766534528 in words is "one hundred sixty-six billion, seven hundred sixty-six million, five hundred thirty-four thousand, five hundred twenty-eight".