66013541540443 has 16 divisors (see below), whose sum is σ = 81389138904000. Its totient is φ = 52249817558016.

The previous prime is 66013541540399. The next prime is 66013541540447. The reversal of 66013541540443 is 34404514531066.

It is a cyclic number.

It is not a de Polignac number, because 66013541540443 - 2¹³ = 66013541532251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66013541540393 and 66013541540402.

It is not an unprimeable number, because it can be changed into a prime (66013541540447) 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, 5233348818 + ... + 5233361431.

It is an arithmetic number, because the mean of its divisors is an integer number (5086821181500).

Almost surely, 2^{66013541540443} is an apocalyptic number.

66013541540443 is a deficient number, since it is larger than the sum of its proper divisors (15375597363557).

66013541540443 is a wasteful number, since it uses less digits than its factorization.

66013541540443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10466710326.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 66013541540443 in words is "sixty-six trillion, thirteen billion, five hundred forty-one million, five hundred forty thousand, four hundred forty-three".