6664533331 has 4 divisors (see below), whose sum is σ = 6676371432. Its totient is φ = 6652695232.

The previous prime is 6664533319. The next prime is 6664533361. The reversal of 6664533331 is 1333354666.

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

It is a cyclic number.

It is not a de Polignac number, because 6664533331 - 2¹⁷ = 6664402259 is a prime.

It is a super-2 number, since 2×6664533331² = 88832009040019911122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664533361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5918206 + ... + 5919331.

It is an arithmetic number, because the mean of its divisors is an integer number (1669092858).

Almost surely, 2^6664533331 is an apocalyptic number.

6664533331 is a deficient number, since it is larger than the sum of its proper divisors (11838101).

6664533331 is a wasteful number, since it uses less digits than its factorization.

6664533331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838100.

The product of its digits is 349920, while the sum is 40.

The square root of 6664533331 is about 81636.5930879039. The cubic root of 6664533331 is about 1881.8712817720.

Adding to 6664533331 its reverse (1333354666), we get a palindrome (7997887997).

The spelling of 6664533331 in words is "six billion, six hundred sixty-four million, five hundred thirty-three thousand, three hundred thirty-one".