6665392768 has 16 divisors (see below), whose sum is σ = 13278712410. Its totient is φ = 3332696320.

The previous prime is 6665392751. The next prime is 6665392777. The reversal of 6665392768 is 8672935666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6284049984 + 381342784 = 79272^2 + 19528^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26036563 + ... + 26036818.

Almost surely, 2^6665392768 is an apocalyptic number.

It is an amenable number.

6665392768 is a deficient number, since it is larger than the sum of its proper divisors (6613319642).

6665392768 is an equidigital number, since it uses as much as digits as its factorization.

6665392768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52073395 (or 52073383 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 58.

The square root of 6665392768 is about 81641.8567157803. The cubic root of 6665392768 is about 1881.9521716713.

The spelling of 6665392768 in words is "six billion, six hundred sixty-five million, three hundred ninety-two thousand, seven hundred sixty-eight".