67228705 has 4 divisors (see below), whose sum is σ = 80674452. Its totient is φ = 53782960.

The previous prime is 67228703. The next prime is 67228717. The reversal of 67228705 is 50782276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26050816 + 41177889 = 5104^2 + 6417^2 .

It is not a de Polignac number, because 67228705 - 2¹ = 67228703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67228703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6722866 + ... + 6722875.

It is an arithmetic number, because the mean of its divisors is an integer number (20168613).

Almost surely, 2^67228705 is an apocalyptic number.

It is an amenable number.

67228705 is a deficient number, since it is larger than the sum of its proper divisors (13445747).

67228705 is a wasteful number, since it uses less digits than its factorization.

67228705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13445746.

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

The square root of 67228705 is about 8199.3112515625. The cubic root of 67228705 is about 406.6164226946.

The spelling of 67228705 in words is "sixty-seven million, two hundred twenty-eight thousand, seven hundred five".