66311453141 has 4 divisors (see below), whose sum is σ = 66968002284. Its totient is φ = 65654904000.

The previous prime is 66311453093. The next prime is 66311453171. The reversal of 66311453141 is 14135411366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14135411366 = 2 ⋅7067705683.

It can be written as a sum of positive squares in 2 ways, for example, as 36737772241 + 29573680900 = 191671^2 + 171970^2 .

It is a cyclic number.

It is not a de Polignac number, because 66311453141 - 2⁶ = 66311453077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311453171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328274420 + ... + 328274621.

It is an arithmetic number, because the mean of its divisors is an integer number (16742000571).

Almost surely, 2^66311453141 is an apocalyptic number.

It is an amenable number.

66311453141 is a deficient number, since it is larger than the sum of its proper divisors (656549143).

66311453141 is a wasteful number, since it uses less digits than its factorization.

66311453141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656549142.

The product of its digits is 25920, while the sum is 35.

The spelling of 66311453141 in words is "sixty-six billion, three hundred eleven million, four hundred fifty-three thousand, one hundred forty-one".