68331805 has 16 divisors (see below), whose sum is σ = 83229120. Its totient is φ = 53851392.

The previous prime is 68331803. The next prime is 68331821. The reversal of 68331805 is 50813386.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68331805 - 2¹ = 68331803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68331803) 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 15 ways as a sum of consecutive naturals, for example, 180106 + ... + 180484.

It is an arithmetic number, because the mean of its divisors is an integer number (5201820).

Almost surely, 2^68331805 is an apocalyptic number.

It is an amenable number.

68331805 is a deficient number, since it is larger than the sum of its proper divisors (14897315).

68331805 is a wasteful number, since it uses less digits than its factorization.

68331805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 68331805 is about 8266.3054020524. The cubic root of 68331805 is about 408.8283125146.

The spelling of 68331805 in words is "sixty-eight million, three hundred thirty-one thousand, eight hundred five".