6668040648 has 16 divisors (see below), whose sum is σ = 16670101680. Its totient is φ = 2222680208.

The previous prime is 6668040647. The next prime is 6668040667. The reversal of 6668040648 is 8460408666.

It is a super-3 number, since 3×6668040648³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6668040597 and 6668040606.

It is not an unprimeable number, because it can be changed into a prime (6668040641) 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, 138917490 + ... + 138917537.

It is an arithmetic number, because the mean of its divisors is an integer number (1041881355).

Almost surely, 2^6668040648 is an apocalyptic number.

It is an amenable number.

6668040648 is an abundant number, since it is smaller than the sum of its proper divisors (10002061032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6668040648 is a wasteful number, since it uses less digits than its factorization.

6668040648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277835036 (or 277835032 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The square root of 6668040648 is about 81658.0715422548. The cubic root of 6668040648 is about 1882.2013454743.

The spelling of 6668040648 in words is "six billion, six hundred sixty-eight million, forty thousand, six hundred forty-eight".