67128055 has 16 divisors (see below), whose sum is σ = 81782784. Its totient is φ = 52889760.

The previous prime is 67128049. The next prime is 67128067. The reversal of 67128055 is 55082176.

It is not a de Polignac number, because 67128055 - 2⁵ = 67128023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67128055.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 144754 + ... + 145216.

It is an arithmetic number, because the mean of its divisors is an integer number (5111424).

Almost surely, 2^67128055 is an apocalyptic number.

67128055 is a deficient number, since it is larger than the sum of its proper divisors (14654729).

67128055 is a wasteful number, since it uses less digits than its factorization.

67128055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 67128055 is about 8193.1712419551. The cubic root of 67128055 is about 406.4134023541.

The spelling of 67128055 in words is "sixty-seven million, one hundred twenty-eight thousand, fifty-five".