67168081 has 4 divisors (see below), whose sum is σ = 67187200. Its totient is φ = 67148964.

The previous prime is 67168063. The next prime is 67168093. The reversal of 67168081 is 18086176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67168081 - 2⁷ = 67167953 is a prime.

It is a super-2 number, since 2×67168081² = 9023102210445122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67168081.

It is not an unprimeable number, because it can be changed into a prime (67165081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2601 + ... + 11878.

It is an arithmetic number, because the mean of its divisors is an integer number (16796800).

Almost surely, 2^67168081 is an apocalyptic number.

It is an amenable number.

67168081 is a deficient number, since it is larger than the sum of its proper divisors (19119).

67168081 is a wasteful number, since it uses less digits than its factorization.

67168081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19118.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 67168081 is about 8195.6135218786. The cubic root of 67168081 is about 406.4941627791.

The spelling of 67168081 in words is "sixty-seven million, one hundred sixty-eight thousand, eighty-one".