67668081 has 32 divisors (see below), whose sum is σ = 100759680. Its totient is φ = 40128000.

The previous prime is 67668077. The next prime is 67668089. The reversal of 67668081 is 18086676.

It is not a de Polignac number, because 67668081 - 2² = 67668077 is a prime.

It is a super-2 number, since 2×67668081² = 9157938372445122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67668089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161290 + ... + 161708.

It is an arithmetic number, because the mean of its divisors is an integer number (3148740).

Almost surely, 2^67668081 is an apocalyptic number.

It is an amenable number.

67668081 is a deficient number, since it is larger than the sum of its proper divisors (33091599).

67668081 is a wasteful number, since it uses less digits than its factorization.

67668081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 67668081 is about 8226.0610865711. The cubic root of 67668081 is about 407.5003194196.

The spelling of 67668081 in words is "sixty-seven million, six hundred sixty-eight thousand, eighty-one".