67078138 has 8 divisors (see below), whose sum is σ = 100783188. Its totient is φ = 33483744.

The previous prime is 67078133. The next prime is 67078139. The reversal of 67078138 is 83187076.

It can be written as a sum of positive squares in 2 ways, for example, as 54567769 + 12510369 = 7387^2 + 3537^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 67078138.

It is not an unprimeable number, because it can be changed into a prime (67078133) 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, 26131 + ... + 28582.

Almost surely, 2^67078138 is an apocalyptic number.

67078138 is a deficient number, since it is larger than the sum of its proper divisors (33705050).

67078138 is a wasteful number, since it uses less digits than its factorization.

67078138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55328.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 67078138 is about 8190.1244190794. The cubic root of 67078138 is about 406.3126398716.

The spelling of 67078138 in words is "sixty-seven million, seventy-eight thousand, one hundred thirty-eight".