66330513543 has 16 divisors (see below), whose sum is σ = 101081421056. Its totient is φ = 37900768320.

The previous prime is 66330513539. The next prime is 66330513553. The reversal of 66330513543 is 34531503366.

It is not a de Polignac number, because 66330513543 - 2² = 66330513539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66330513503) 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 15 ways as a sum of consecutive naturals, for example, 275763 + ... + 456843.

It is an arithmetic number, because the mean of its divisors is an integer number (6317588816).

Almost surely, 2^66330513543 is an apocalyptic number.

66330513543 is a deficient number, since it is larger than the sum of its proper divisors (34750907513).

66330513543 is a wasteful number, since it uses less digits than its factorization.

66330513543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198534.

The product of its (nonzero) digits is 291600, while the sum is 39.

The spelling of 66330513543 in words is "sixty-six billion, three hundred thirty million, five hundred thirteen thousand, five hundred forty-three".