68133361 has 4 divisors (see below), whose sum is σ = 68149872. Its totient is φ = 68116852.

The previous prime is 68133353. The next prime is 68133389. The reversal of 68133361 is 16333186.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16333186 = 2 ⋅8166593.

It is a cyclic number.

It is not a de Polignac number, because 68133361 - 2³ = 68133353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68133301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3966 + ... + 12328.

It is an arithmetic number, because the mean of its divisors is an integer number (17037468).

Almost surely, 2^68133361 is an apocalyptic number.

It is an amenable number.

68133361 is a deficient number, since it is larger than the sum of its proper divisors (16511).

68133361 is an equidigital number, since it uses as much as digits as its factorization.

68133361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16510.

The product of its digits is 7776, while the sum is 31.

The square root of 68133361 is about 8254.2934888457. The cubic root of 68133361 is about 408.4321661456.

The spelling of 68133361 in words is "sixty-eight million, one hundred thirty-three thousand, three hundred sixty-one".