66147366131 has 16 divisors (see below), whose sum is σ = 82896764928. Its totient is φ = 51276326400.

The previous prime is 66147366079. The next prime is 66147366149. The reversal of 66147366131 is 13166374166.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66147366131 - 2¹⁴ = 66147349747 is a prime.

It is a super-2 number, since 2×66147366131² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66147366151) 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, 2210675 + ... + 2240396.

It is an arithmetic number, because the mean of its divisors is an integer number (5181047808).

Almost surely, 2^66147366131 is an apocalyptic number.

66147366131 is a deficient number, since it is larger than the sum of its proper divisors (16749398797).

66147366131 is a wasteful number, since it uses less digits than its factorization.

66147366131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451282.

The product of its digits is 326592, while the sum is 44.

The spelling of 66147366131 in words is "sixty-six billion, one hundred forty-seven million, three hundred sixty-six thousand, one hundred thirty-one".