6663626341 has 4 divisors (see below), whose sum is σ = 6680411692. Its totient is φ = 6646840992.

The previous prime is 6663626339. The next prime is 6663626371. The reversal of 6663626341 is 1436263666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1596322116 + 5067304225 = 39954^2 + 71185^2 .

It is a cyclic number.

It is not a de Polignac number, because 6663626341 - 2¹ = 6663626339 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 (6663626371) 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, 8392080 + ... + 8392873.

It is an arithmetic number, because the mean of its divisors is an integer number (1670102923).

Almost surely, 2^6663626341 is an apocalyptic number.

It is an amenable number.

6663626341 is a deficient number, since it is larger than the sum of its proper divisors (16785351).

6663626341 is a wasteful number, since it uses less digits than its factorization.

6663626341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785350.

The product of its digits is 559872, while the sum is 43.

The square root of 6663626341 is about 81631.0378532578. The cubic root of 6663626341 is about 1881.7859086591.

The spelling of 6663626341 in words is "six billion, six hundred sixty-three million, six hundred twenty-six thousand, three hundred forty-one".