6668755472 has 20 divisors (see below), whose sum is σ = 12931581180. Its totient is φ = 3331573248.

The previous prime is 6668755463. The next prime is 6668755477. The reversal of 6668755472 is 2745578666.

It can be written as a sum of positive squares in 2 ways, for example, as 3931791616 + 2736963856 = 62704^2 + 52316^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6668755477) 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, 155597 + ... + 193772.

It is an arithmetic number, because the mean of its divisors is an integer number (646579059).

Almost surely, 2^6668755472 is an apocalyptic number.

It is an amenable number.

6668755472 is a deficient number, since it is larger than the sum of its proper divisors (6262825708).

6668755472 is a wasteful number, since it uses less digits than its factorization.

6668755472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350570 (or 350564 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 56.

The square root of 6668755472 is about 81662.4483590836. The cubic root of 6668755472 is about 1882.2686013440.

The spelling of 6668755472 in words is "six billion, six hundred sixty-eight million, seven hundred fifty-five thousand, four hundred seventy-two".