66281035133 has 8 divisors (see below), whose sum is σ = 67917822840. Its totient is φ = 64645208320.

The previous prime is 66281035111. The next prime is 66281035159. The reversal of 66281035133 is 33153018266.

It can be written as a sum of positive squares in 4 ways, for example, as 5073285529 + 61207749604 = 71227^2 + 247402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66281035133 - 2²⁶ = 66213926269 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 (66281035193) 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, 99560 + ... + 377457.

It is an arithmetic number, because the mean of its divisors is an integer number (8489727855).

Almost surely, 2^66281035133 is an apocalyptic number.

It is an amenable number.

66281035133 is a deficient number, since it is larger than the sum of its proper divisors (1636787707).

66281035133 is a wasteful number, since it uses less digits than its factorization.

66281035133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480447.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 66281035133 in words is "sixty-six billion, two hundred eighty-one million, thirty-five thousand, one hundred thirty-three".