166605161566064 has 80 divisors (see below), whose sum is σ = 349090437407040. Its totient is φ = 76571406827520.

The previous prime is 166605161566037. The next prime is 166605161566073. The reversal of 166605161566064 is 460665161506661.

166605161566064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 166605161565994 and 166605161566012.

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, 170089742 + ... + 171066450.

It is an arithmetic number, because the mean of its divisors is an integer number (4363630467588).

Almost surely, 2^{166605161566064} 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 166605161566064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174545218703520).

166605161566064 is an abundant number, since it is smaller than the sum of its proper divisors (182485275840976).

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

166605161566064 is a wasteful number, since it uses less digits than its factorization.

166605161566064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980178 (or 980172 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 59.

The spelling of 166605161566064 in words is "one hundred sixty-six trillion, six hundred five billion, one hundred sixty-one million, five hundred sixty-six thousand, sixty-four".