66041318851 has 4 divisors (see below), whose sum is σ = 66461964352. Its totient is φ = 65620673352.

The previous prime is 66041318839. The next prime is 66041318869. The reversal of 66041318851 is 15881314066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66041318851 is a prime.

It is a super-2 number, since 2×66041318851² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66041318798 and 66041318807.

It is not an unprimeable number, because it can be changed into a prime (66041318881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210322515 + ... + 210322828.

It is an arithmetic number, because the mean of its divisors is an integer number (16615491088).

Almost surely, 2^66041318851 is an apocalyptic number.

66041318851 is a deficient number, since it is larger than the sum of its proper divisors (420645501).

66041318851 is a wasteful number, since it uses less digits than its factorization.

66041318851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420645500.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 66041318851 in words is "sixty-six billion, forty-one million, three hundred eighteen thousand, eight hundred fifty-one".