168081668 has 24 divisors (see below), whose sum is σ = 302702400. Its totient is φ = 81617760.

The previous prime is 168081653. The next prime is 168081671. The reversal of 168081668 is 866180861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28433 + ... + 33831.

It is an arithmetic number, because the mean of its divisors is an integer number (12612600).

Almost surely, 2^168081668 is an apocalyptic number.

It is an amenable number.

168081668 is a deficient number, since it is larger than the sum of its proper divisors (134620732).

168081668 is a wasteful number, since it uses less digits than its factorization.

168081668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5625 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 168081668 is about 12964.6314255362. The cubic root of 168081668 is about 551.8742318315.

The spelling of 168081668 in words is "one hundred sixty-eight million, eighty-one thousand, six hundred sixty-eight".