66604125255 has 8 divisors (see below), whose sum is σ = 106566600432. Its totient is φ = 35522200128.

The previous prime is 66604125253. The next prime is 66604125281. The reversal of 66604125255 is 55252140666.

It is a happy number.

66604125255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66604125255 - 2¹ = 66604125253 is a prime.

It is a super-2 number, since 2×66604125255² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604125251) 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, 2220137494 + ... + 2220137523.

It is an arithmetic number, because the mean of its divisors is an integer number (13320825054).

Almost surely, 2^66604125255 is an apocalyptic number.

66604125255 is a deficient number, since it is larger than the sum of its proper divisors (39962475177).

66604125255 is a wasteful number, since it uses less digits than its factorization.

66604125255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440275025.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 66604125255 in words is "sixty-six billion, six hundred four million, one hundred twenty-five thousand, two hundred fifty-five".