66042104449 has 8 divisors (see below), whose sum is σ = 66155626152. Its totient is φ = 65928629760.

The previous prime is 66042104431. The next prime is 66042104467. The reversal of 66042104449 is 94440124066.

It is an interprime number because it is at equal distance from previous prime (66042104431) and next prime (66042104467).

It can be written as a sum of positive squares in 4 ways, for example, as 6911428225 + 59130676224 = 83135^2 + 243168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66042104449 - 2¹⁵ = 66042071681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66042107449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3855147 + ... + 3872239.

It is an arithmetic number, because the mean of its divisors is an integer number (8269453269).

Almost surely, 2^66042104449 is an apocalyptic number.

It is an amenable number.

66042104449 is a deficient number, since it is larger than the sum of its proper divisors (113521703).

66042104449 is a wasteful number, since it uses less digits than its factorization.

66042104449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23507.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 66042104449 in words is "sixty-six billion, forty-two million, one hundred four thousand, four hundred forty-nine".