66810054613078 has 16 divisors (see below), whose sum is σ = 121268670558624. Its totient is φ = 26948593457280.

The previous prime is 66810054613073. The next prime is 66810054613153. The reversal of 66810054613078 is 87031645001866.

66810054613078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66810054613073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140357257353 + ... + 140357257828.

It is an arithmetic number, because the mean of its divisors is an integer number (7579291909914).

Almost surely, 2^{66810054613078} is an apocalyptic number.

66810054613078 is a deficient number, since it is larger than the sum of its proper divisors (54458615945546).

66810054613078 is a wasteful number, since it uses less digits than its factorization.

66810054613078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280714515207.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 66810054613078 in words is "sixty-six trillion, eight hundred ten billion, fifty-four million, six hundred thirteen thousand, seventy-eight".