68220577 has 4 divisors (see below), whose sum is σ = 68253696. Its totient is φ = 68187460.

The previous prime is 68220571. The next prime is 68220587. The reversal of 68220577 is 77502286.

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.

It is a cyclic number.

It is not a de Polignac number, because 68220577 - 2³ = 68220569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68220571) 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 3 ways as a sum of consecutive naturals, for example, 13249 + ... + 17662.

It is an arithmetic number, because the mean of its divisors is an integer number (17063424).

Almost surely, 2^68220577 is an apocalyptic number.

It is an amenable number.

68220577 is a deficient number, since it is larger than the sum of its proper divisors (33119).

68220577 is a wasteful number, since it uses less digits than its factorization.

68220577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33118.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 68220577 is about 8259.5748679941. The cubic root of 68220577 is about 408.6063668138.

The spelling of 68220577 in words is "sixty-eight million, two hundred twenty thousand, five hundred seventy-seven".