67778442 has 24 divisors (see below), whose sum is σ = 149263140. Its totient is φ = 22222080.

The previous prime is 67778419. The next prime is 67778521. The reversal of 67778442 is 24487776.

It can be written as a sum of positive squares in 2 ways, for example, as 67716441 + 62001 = 8229^2 + 249^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 29767 + ... + 31962.

Almost surely, 2^67778442 is an apocalyptic number.

67778442 is an abundant number, since it is smaller than the sum of its proper divisors (81484698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67778442 is a wasteful number, since it uses less digits than its factorization.

67778442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61798 (or 61795 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 67778442 is about 8232.7663637443. The cubic root of 67778442 is about 407.7217321133.

The spelling of 67778442 in words is "sixty-seven million, seven hundred seventy-eight thousand, four hundred forty-two".