6671378311 has 8 divisors (see below), whose sum is σ = 7221789680. Its totient is φ = 6126285312.

The previous prime is 6671378309. The next prime is 6671378393. The reversal of 6671378311 is 1138731766.

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

It is a cyclic number.

It is not a de Polignac number, because 6671378311 - 2¹ = 6671378309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6671378111) 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 7 ways as a sum of consecutive naturals, for example, 1326981 + ... + 1331998.

It is an arithmetic number, because the mean of its divisors is an integer number (902723710).

Almost surely, 2^6671378311 is an apocalyptic number.

6671378311 is a deficient number, since it is larger than the sum of its proper divisors (550411369).

6671378311 is a wasteful number, since it uses less digits than its factorization.

6671378311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659185.

The product of its digits is 127008, while the sum is 43.

The square root of 6671378311 is about 81678.5058078317. The cubic root of 6671378311 is about 1882.5153360573.

The spelling of 6671378311 in words is "six billion, six hundred seventy-one million, three hundred seventy-eight thousand, three hundred eleven".