166505168 has 10 divisors (see below), whose sum is σ = 322603794. Its totient is φ = 83252576.

The previous prime is 166505137. The next prime is 166505197. The reversal of 166505168 is 861505661.

166505168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 149132944 + 17372224 = 12212^2 + 4168^2 .

It is a super-3 number, since 3×166505168³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5203271 + ... + 5203302.

Almost surely, 2^166505168 is an apocalyptic number.

It is an amenable number.

166505168 is a deficient number, since it is larger than the sum of its proper divisors (156098626).

166505168 is a wasteful number, since it uses less digits than its factorization.

166505168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406581 (or 10406575 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 166505168 is about 12903.6881549424. The cubic root of 166505168 is about 550.1433984220.

The spelling of 166505168 in words is "one hundred sixty-six million, five hundred five thousand, one hundred sixty-eight".