6678771321 has 16 divisors (see below), whose sum is σ = 9150160448. Its totient is φ = 4330065600.

The previous prime is 6678771313. The next prime is 6678771343. The reversal of 6678771321 is 1231778766.

It is not a de Polignac number, because 6678771321 - 2³ = 6678771313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6678771371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232986 + ... + 260076.

It is an arithmetic number, because the mean of its divisors is an integer number (571885028).

Almost surely, 2^6678771321 is an apocalyptic number.

It is an amenable number.

6678771321 is a deficient number, since it is larger than the sum of its proper divisors (2471389127).

6678771321 is a wasteful number, since it uses less digits than its factorization.

6678771321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29352.

The product of its digits is 592704, while the sum is 48.

The square root of 6678771321 is about 81723.7500424448. The cubic root of 6678771321 is about 1883.2104606256.

The spelling of 6678771321 in words is "six billion, six hundred seventy-eight million, seven hundred seventy-one thousand, three hundred twenty-one".