66671004433 has 4 divisors (see below), whose sum is σ = 72732004848. Its totient is φ = 60610004020.

The previous prime is 66671004397. The next prime is 66671004479. The reversal of 66671004433 is 33440017666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66671004433 - 2⁹ = 66671003921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66671004133) 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, 3030500191 + ... + 3030500212.

It is an arithmetic number, because the mean of its divisors is an integer number (18183001212).

Almost surely, 2^66671004433 is an apocalyptic number.

It is an amenable number.

66671004433 is a deficient number, since it is larger than the sum of its proper divisors (6061000415).

66671004433 is a wasteful number, since it uses less digits than its factorization.

66671004433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061000414.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 66671004433 in words is "sixty-six billion, six hundred seventy-one million, four thousand, four hundred thirty-three".