168901668 has 36 divisors (see below), whose sum is σ = 459789148. Its totient is φ = 51969600.

The previous prime is 168901661. The next prime is 168901679. The reversal of 168901668 is 866109861.

It is a happy number.

168901668 is digitally balanced in base 3, 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 2 ways, for example, as 68260644 + 100641024 = 8262^2 + 10032^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (168901661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179983 + ... + 180918.

Almost surely, 2^168901668 is an apocalyptic number.

168901668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168901668 is an abundant number, since it is smaller than the sum of its proper divisors (290887480).

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

168901668 is a wasteful number, since it uses less digits than its factorization.

168901668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360924 (or 360919 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 168901668 is about 12996.2174497044. The cubic root of 168901668 is about 552.7702306854.

The spelling of 168901668 in words is "one hundred sixty-eight million, nine hundred one thousand, six hundred sixty-eight".