66175336779 has 8 divisors (see below), whose sum is σ = 88235062272. Its totient is φ = 44116251240.

The previous prime is 66175336771. The next prime is 66175336813. The reversal of 66175336779 is 97763357166.

66175336779 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 66175336779 - 2³ = 66175336771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66175336771) 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, 191802 + ... + 411264.

It is an arithmetic number, because the mean of its divisors is an integer number (11029382784).

Almost surely, 2^66175336779 is an apocalyptic number.

66175336779 is a deficient number, since it is larger than the sum of its proper divisors (22059725493).

66175336779 is a wasteful number, since it uses less digits than its factorization.

66175336779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319977.

The product of its digits is 30005640, while the sum is 60.

The spelling of 66175336779 in words is "sixty-six billion, one hundred seventy-five million, three hundred thirty-six thousand, seven hundred seventy-nine".