66544333258 has 32 divisors (see below), whose sum is σ = 108049410000. Its totient is φ = 30554689536.

The previous prime is 66544333223. The next prime is 66544333259. The reversal of 66544333258 is 85233344566.

It can be written as a sum of positive squares in 8 ways, for example, as 16082551489 + 50461781769 = 126817^2 + 224637^2 .

It is not an unprimeable number, because it can be changed into a prime (66544333259) 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 15 ways as a sum of consecutive naturals, for example, 4066060 + ... + 4082392.

Almost surely, 2^66544333258 is an apocalyptic number.

66544333258 is a deficient number, since it is larger than the sum of its proper divisors (41505076742).

66544333258 is a wasteful number, since it uses less digits than its factorization.

66544333258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17146.

The product of its digits is 6220800, while the sum is 49.

The spelling of 66544333258 in words is "sixty-six billion, five hundred forty-four million, three hundred thirty-three thousand, two hundred fifty-eight".