6681377145 has 32 divisors (see below), whose sum is σ = 11684183040. Its totient is φ = 3245598720.

The previous prime is 6681377141. The next prime is 6681377147. The reversal of 6681377145 is 5417731866.

6681377145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6681377145 - 2² = 6681377141 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6681377094 and 6681377103.

It is not an unprimeable number, because it can be changed into a prime (6681377141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414700 + ... + 430509.

It is an arithmetic number, because the mean of its divisors is an integer number (365130720).

Almost surely, 2^6681377145 is an apocalyptic number.

It is an amenable number.

6681377145 is a deficient number, since it is larger than the sum of its proper divisors (5002805895).

6681377145 is a wasteful number, since it uses less digits than its factorization.

6681377145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845265.

The product of its digits is 846720, while the sum is 48.

The square root of 6681377145 is about 81739.6913683921. The cubic root of 6681377145 is about 1883.4553498274.

The spelling of 6681377145 in words is "six billion, six hundred eighty-one million, three hundred seventy-seven thousand, one hundred forty-five".