68391066 has 8 divisors (see below), whose sum is σ = 136782144. Its totient is φ = 22797020.

The previous prime is 68391049. The next prime is 68391097. The reversal of 68391066 is 66019386.

It is a happy number.

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

68391066 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5699250 + ... + 5699261.

It is an arithmetic number, because the mean of its divisors is an integer number (17097768).

Almost surely, 2^68391066 is an apocalyptic number.

68391066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68391066 is a wasteful number, since it uses less digits than its factorization.

68391066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11398516.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 68391066 is about 8269.8891165481. The cubic root of 68391066 is about 408.9464642996.

The spelling of 68391066 in words is "sixty-eight million, three hundred ninety-one thousand, sixty-six".