66078053108173 has 8 divisors (see below), whose sum is σ = 67006792885248. Its totient is φ = 65149950114144.

The previous prime is 66078053108167. The next prime is 66078053108183. The reversal of 66078053108173 is 37180135087066.

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

It is a cyclic number.

It is not a de Polignac number, because 66078053108173 - 2⁵ = 66078053108141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66078053108183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158986765 + ... + 159401842.

It is an arithmetic number, because the mean of its divisors is an integer number (8375849110656).

Almost surely, 2^{66078053108173} is an apocalyptic number.

It is an amenable number.

66078053108173 is a deficient number, since it is larger than the sum of its proper divisors (928739777075).

66078053108173 is a wasteful number, since it uses less digits than its factorization.

66078053108173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318391523.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 66078053108173 in words is "sixty-six trillion, seventy-eight billion, fifty-three million, one hundred eight thousand, one hundred seventy-three".