66643113255 has 32 divisors (see below), whose sum is σ = 107337472704. Its totient is φ = 35307396096.

The previous prime is 66643113209. The next prime is 66643113259. The reversal of 66643113255 is 55231134666.

It is not a de Polignac number, because 66643113255 - 2⁶ = 66643113191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66643113259) 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 31 ways as a sum of consecutive naturals, for example, 1912347 + ... + 1946883.

It is an arithmetic number, because the mean of its divisors is an integer number (3354296022).

Almost surely, 2^66643113255 is an apocalyptic number.

66643113255 is a deficient number, since it is larger than the sum of its proper divisors (40694359449).

66643113255 is a wasteful number, since it uses less digits than its factorization.

66643113255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35395.

The product of its digits is 388800, while the sum is 42.

The spelling of 66643113255 in words is "sixty-six billion, six hundred forty-three million, one hundred thirteen thousand, two hundred fifty-five".