66013126845 has 16 divisors (see below), whose sum is σ = 105628436160. Its totient is φ = 35204523264.

The previous prime is 66013126841. The next prime is 66013126889. The reversal of 66013126845 is 54862131066.

It is not a de Polignac number, because 66013126845 - 2² = 66013126841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66013126797 and 66013126806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013126841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76542 + ... + 371328.

It is an arithmetic number, because the mean of its divisors is an integer number (6601777260).

Almost surely, 2^66013126845 is an apocalyptic number.

It is an amenable number.

66013126845 is a deficient number, since it is larger than the sum of its proper divisors (39615309315).

66013126845 is a wasteful number, since it uses less digits than its factorization.

66013126845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309724.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 66013126845 in words is "sixty-six billion, thirteen million, one hundred twenty-six thousand, eight hundred forty-five".