166605616 has 20 divisors (see below), whose sum is σ = 328271400. Its totient is φ = 81890432.

The previous prime is 166605611. The next prime is 166605619. The reversal of 166605616 is 616506661.

166605616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166605611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87301 + ... + 89188.

It is an arithmetic number, because the mean of its divisors is an integer number (16413570).

Almost surely, 2^166605616 is an apocalyptic number.

166605616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166605616 is a deficient number, since it is larger than the sum of its proper divisors (161665784).

166605616 is a wasteful number, since it uses less digits than its factorization.

166605616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176556 (or 176550 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 166605616 is about 12907.5797886358. The cubic root of 166605616 is about 550.2540049896.

The spelling of 166605616 in words is "one hundred sixty-six million, six hundred five thousand, six hundred sixteen".