67222777 has 4 divisors (see below), whose sum is σ = 71177076. Its totient is φ = 63268480.

The previous prime is 67222723. The next prime is 67222789. The reversal of 67222777 is 77722276.

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 37748736 + 29474041 = 6144^2 + 5429^2 .

It is a cyclic number.

It is not a de Polignac number, because 67222777 - 2²³ = 58834169 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67222277) 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, 1977124 + ... + 1977157.

It is an arithmetic number, because the mean of its divisors is an integer number (17794269).

Almost surely, 2^67222777 is an apocalyptic number.

It is an amenable number.

67222777 is a deficient number, since it is larger than the sum of its proper divisors (3954299).

67222777 is a wasteful number, since it uses less digits than its factorization.

67222777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954298.

The product of its digits is 115248, while the sum is 40.

The square root of 67222777 is about 8198.9497498155. The cubic root of 67222777 is about 406.6044709893.

The spelling of 67222777 in words is "sixty-seven million, two hundred twenty-two thousand, seven hundred seventy-seven".