6648413666 has 8 divisors (see below), whose sum is σ = 9984769884. Its totient is φ = 3320157040.

The previous prime is 6648413663. The next prime is 6648413699. The reversal of 6648413666 is 6663148466.

It can be written as a sum of positive squares in 2 ways, for example, as 5432427025 + 1215986641 = 73705^2 + 34871^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6648413663) 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, 2022845 + ... + 2026128.

Almost surely, 2^6648413666 is an apocalyptic number.

6648413666 is a deficient number, since it is larger than the sum of its proper divisors (3336356218).

6648413666 is a wasteful number, since it uses less digits than its factorization.

6648413666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049796.

The product of its digits is 2985984, while the sum is 50.

The square root of 6648413666 is about 81537.8051335698. The cubic root of 6648413666 is about 1880.3528146125.

The spelling of 6648413666 in words is "six billion, six hundred forty-eight million, four hundred thirteen thousand, six hundred sixty-six".