168668550 has 36 divisors (see below), whose sum is σ = 453157380. Its totient is φ = 44978160.

The previous prime is 168668531. The next prime is 168668557. The reversal of 168668550 is 55866861.

168668550 is a `hidden beast` number, since 16 + 86 + 6 + 8 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168668496 and 168668505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168668557) 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 17 ways as a sum of consecutive naturals, for example, 186960 + ... + 187859.

It is an arithmetic number, because the mean of its divisors is an integer number (12587705).

Almost surely, 2^168668550 is an apocalyptic number.

168668550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168668550 is an abundant number, since it is smaller than the sum of its proper divisors (284488830).

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

168668550 is a wasteful number, since it uses less digits than its factorization.

168668550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374837 (or 374829 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 168668550 is about 12987.2456664221. The cubic root of 168668550 is about 552.5158025278.

The spelling of 168668550 in words is "one hundred sixty-eight million, six hundred sixty-eight thousand, five hundred fifty".