168566140 has 12 divisors (see below), whose sum is σ = 353988936. Its totient is φ = 67426448.

The previous prime is 168566107. The next prime is 168566143. The reversal of 168566140 is 41665861.

It is a self number, because there is not a number n which added to its sum of digits gives 168566140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168566143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214134 + ... + 4214173.

It is an arithmetic number, because the mean of its divisors is an integer number (29499078).

Almost surely, 2^168566140 is an apocalyptic number.

168566140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168566140 is an abundant number, since it is smaller than the sum of its proper divisors (185422796).

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

168566140 is a wasteful number, since it uses less digits than its factorization.

168566140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428316 (or 8428314 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 168566140 is about 12983.3023534076. The cubic root of 168566140 is about 552.4039567430.

The spelling of 168566140 in words is "one hundred sixty-eight million, five hundred sixty-six thousand, one hundred forty".