68000081 has 8 divisors (see below), whose sum is σ = 70301184. Its totient is φ = 65705760.

The previous prime is 68000077. The next prime is 68000129. The reversal of 68000081 is 18000086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68000081 - 2² = 68000077 is a prime.

It is a super-3 number, since 3×68000081³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68000021) 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, 26261 + ... + 28733.

It is an arithmetic number, because the mean of its divisors is an integer number (8787648).

Almost surely, 2^68000081 is an apocalyptic number.

It is an amenable number.

68000081 is a deficient number, since it is larger than the sum of its proper divisors (2301103).

68000081 is a wasteful number, since it uses less digits than its factorization.

68000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 68000081 is about 8246.2161625803. The cubic root of 68000081 is about 408.1656722574.

The spelling of 68000081 in words is "sixty-eight million, eighty-one", and thus it is an aban number and an uban number.