166516064079872 has 104 divisors (see below), whose sum is σ = 358624137637920. Its totient is φ = 76849724620800.

The previous prime is 166516064079863. The next prime is 166516064079899. The reversal of 166516064079872 is 278970460615661.

166516064079872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (104).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253338247 + ... + 1253471097.

Almost surely, 2^{166516064079872} 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 166516064079872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179312068818960).

166516064079872 is an abundant number, since it is smaller than the sum of its proper divisors (192108073558048).

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

166516064079872 is a wasteful number, since it uses less digits than its factorization.

166516064079872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156427 (or 156405 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 166516064079872 in words is "one hundred sixty-six trillion, five hundred sixteen billion, sixty-four million, seventy-nine thousand, eight hundred seventy-two".