1668061168 has 20 divisors (see below), whose sum is σ = 3242405320. Its totient is φ = 831311424.

The previous prime is 1668061163. The next prime is 1668061201. The reversal of 1668061168 is 8611608661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668061163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164883 + ... + 174706.

It is an arithmetic number, because the mean of its divisors is an integer number (162120266).

Almost surely, 2^1668061168 is an apocalyptic number.

It is an amenable number.

1668061168 is a deficient number, since it is larger than the sum of its proper divisors (1574344152).

1668061168 is a wasteful number, since it uses less digits than its factorization.

1668061168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339904 (or 339898 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1668061168 is about 40841.9045589209. The cubic root of 1668061168 is about 1185.9616821452.

The spelling of 1668061168 in words is "one billion, six hundred sixty-eight million, sixty-one thousand, one hundred sixty-eight".