68220755 has 8 divisors (see below), whose sum is σ = 82114224. Its totient is φ = 54410400.

The previous prime is 68220751. The next prime is 68220793. The reversal of 68220755 is 55702286.

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

It is not a de Polignac number, because 68220755 - 2² = 68220751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68220751) 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 7 ways as a sum of consecutive naturals, for example, 18956 + ... + 22265.

It is an arithmetic number, because the mean of its divisors is an integer number (10264278).

Almost surely, 2^68220755 is an apocalyptic number.

68220755 is a deficient number, since it is larger than the sum of its proper divisors (13893469).

68220755 is a wasteful number, since it uses less digits than its factorization.

68220755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41557.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 68220755 is about 8259.5856433601. The cubic root of 68220755 is about 408.6067221898.

The spelling of 68220755 in words is "sixty-eight million, two hundred twenty thousand, seven hundred fifty-five".