66134818281 has 24 divisors (see below), whose sum is σ = 103592084544. Its totient is φ = 37417144800.

The previous prime is 66134818273. The next prime is 66134818301. The reversal of 66134818281 is 18281843166.

It is not a de Polignac number, because 66134818281 - 2³ = 66134818273 is a prime.

It is a super-2 number, since 2×66134818281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66134818281.

It is not an unprimeable number, because it can be changed into a prime (66134818231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2212365 + ... + 2242058.

It is an arithmetic number, because the mean of its divisors is an integer number (4316336856).

Almost surely, 2^66134818281 is an apocalyptic number.

It is an amenable number.

66134818281 is a deficient number, since it is larger than the sum of its proper divisors (37457266263).

66134818281 is a wasteful number, since it uses less digits than its factorization.

66134818281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454541 (or 4454534 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The spelling of 66134818281 in words is "sixty-six billion, one hundred thirty-four million, eight hundred eighteen thousand, two hundred eighty-one".