168865668 has 24 divisors (see below), whose sum is σ = 437800160. Its totient is φ = 56288520.

The previous prime is 168865667. The next prime is 168865699. The reversal of 168865668 is 866568861.

It is a happy number.

It is a super-2 number, since 2×168865668² = 57031227658172448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (168865667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781678 + ... + 781893.

Almost surely, 2^168865668 is an apocalyptic number.

168865668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168865668 is an abundant number, since it is smaller than the sum of its proper divisors (268934492).

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

168865668 is a wasteful number, since it uses less digits than its factorization.

168865668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563584 (or 1563576 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 168865668 is about 12994.8323575181. The cubic root of 168865668 is about 552.7309550869.

The spelling of 168865668 in words is "one hundred sixty-eight million, eight hundred sixty-five thousand, six hundred sixty-eight".