66829127913 has 12 divisors (see below), whose sum is σ = 97178823300. Its totient is φ = 44253739296.

The previous prime is 66829127909. The next prime is 66829127921. The reversal of 66829127913 is 31972192866.

It can be written as a sum of positive squares in 2 ways, for example, as 8939324304 + 57889803609 = 94548^2 + 240603^2 .

It is not a de Polignac number, because 66829127913 - 2² = 66829127909 is a prime.

It is a super-2 number, since 2×66829127913² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66829127913.

It is not an unprimeable number, because it can be changed into a prime (66829127993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24916306 + ... + 24918987.

It is an arithmetic number, because the mean of its divisors is an integer number (8098235275).

Almost surely, 2^66829127913 is an apocalyptic number.

It is an amenable number.

66829127913 is a deficient number, since it is larger than the sum of its proper divisors (30349695387).

66829127913 is a wasteful number, since it uses less digits than its factorization.

66829127913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49835448 (or 49835445 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 66829127913 in words is "sixty-six billion, eight hundred twenty-nine million, one hundred twenty-seven thousand, nine hundred thirteen".