6664333538 has 8 divisors (see below), whose sum is σ = 9998274540. Its totient is φ = 3331575360.

The previous prime is 6664333499. The next prime is 6664333547. The reversal of 6664333538 is 8353334666.

It can be written as a sum of positive squares in 2 ways, for example, as 4412546329 + 2251787209 = 66427^2 + 47453^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6664333492 and 6664333501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281483 + ... + 304238.

Almost surely, 2^6664333538 is an apocalyptic number.

6664333538 is a deficient number, since it is larger than the sum of its proper divisors (3333941002).

6664333538 is a wasteful number, since it uses less digits than its factorization.

6664333538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591412.

The product of its digits is 2799360, while the sum is 47.

The square root of 6664333538 is about 81635.3694056688. The cubic root of 6664333538 is about 1881.8524763309.

The spelling of 6664333538 in words is "six billion, six hundred sixty-four million, three hundred thirty-three thousand, five hundred thirty-eight".