6665361011 has 4 divisors (see below), whose sum is σ = 6665637912. Its totient is φ = 6665084112.

The previous prime is 6665360983. The next prime is 6665361091. The reversal of 6665361011 is 1101635666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6665361011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6665361091) 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 3 ways as a sum of consecutive naturals, for example, 98501 + ... + 151766.

It is an arithmetic number, because the mean of its divisors is an integer number (1666409478).

Almost surely, 2^6665361011 is an apocalyptic number.

6665361011 is a deficient number, since it is larger than the sum of its proper divisors (276901).

6665361011 is a wasteful number, since it uses less digits than its factorization.

6665361011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276900.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6665361011 is about 81641.6622258513. The cubic root of 6665361011 is about 1881.9491828377.

Adding to 6665361011 its reverse (1101635666), we get a palindrome (7766996677).

The spelling of 6665361011 in words is "six billion, six hundred sixty-five million, three hundred sixty-one thousand, eleven".