6661135247 has 8 divisors (see below), whose sum is σ = 7175290416. Its totient is φ = 6147231552.

The previous prime is 6661135213. The next prime is 6661135253. The reversal of 6661135247 is 7425311666.

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 6661135247 - 2¹⁰ = 6661134223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661135267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5933 + ... + 115574.

It is an arithmetic number, because the mean of its divisors is an integer number (896911302).

Almost surely, 2^6661135247 is an apocalyptic number.

6661135247 is a deficient number, since it is larger than the sum of its proper divisors (514155169).

6661135247 is a wasteful number, since it uses less digits than its factorization.

6661135247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125737.

The product of its digits is 181440, while the sum is 41.

The square root of 6661135247 is about 81615.7781743212. The cubic root of 6661135247 is about 1881.5513872134.

The spelling of 6661135247 in words is "six billion, six hundred sixty-one million, one hundred thirty-five thousand, two hundred forty-seven".