6660042243 has 8 divisors (see below), whose sum is σ = 8889093888. Its totient is φ = 4435509384.

The previous prime is 6660042209. The next prime is 6660042253. The reversal of 6660042243 is 3422400666.

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

It is a de Polignac number, because none of the positive numbers 2^k-6660042243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660042253) 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, 1126255 + ... + 1132152.

It is an arithmetic number, because the mean of its divisors is an integer number (1111136736).

Almost surely, 2^6660042243 is an apocalyptic number.

6660042243 is a deficient number, since it is larger than the sum of its proper divisors (2229051645).

6660042243 is a wasteful number, since it uses less digits than its factorization.

6660042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259393.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 6660042243 is about 81609.0818659296. The cubic root of 6660042243 is about 1881.4484690365.

The spelling of 6660042243 in words is "six billion, six hundred sixty million, forty-two thousand, two hundred forty-three".