166745645 has 16 divisors (see below), whose sum is σ = 218939328. Its totient is φ = 120906240.

The previous prime is 166745641. The next prime is 166745669. The reversal of 166745645 is 546547661.

166745645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166745645 - 2² = 166745641 is a prime.

It is a super-3 number, since 3×166745645³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166745596 and 166745605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166745641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14717 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (13683708).

Almost surely, 2^166745645 is an apocalyptic number.

It is an amenable number.

166745645 is a deficient number, since it is larger than the sum of its proper divisors (52193683).

166745645 is a wasteful number, since it uses less digits than its factorization.

166745645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100.

The product of its digits is 604800, while the sum is 44.

The square root of 166745645 is about 12913.0029427705. The cubic root of 166745645 is about 550.4081213257.

The spelling of 166745645 in words is "one hundred sixty-six million, seven hundred forty-five thousand, six hundred forty-five".