6676387821 has 24 divisors (see below), whose sum is σ = 10027370080. Its totient is φ = 4439120112.

The previous prime is 6676387787. The next prime is 6676387843. The reversal of 6676387821 is 1287836766.

It is not a de Polignac number, because 6676387821 - 2¹³ = 6676379629 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 (6676387871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55851 + ... + 128343.

Almost surely, 2^6676387821 is an apocalyptic number.

It is an amenable number.

6676387821 is a deficient number, since it is larger than the sum of its proper divisors (3350982259).

6676387821 is an equidigital number, since it uses as much as digits as its factorization.

6676387821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72887 (or 72875 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 6676387821 is about 81709.1660770075. The cubic root of 6676387821 is about 1882.9864091254.

The spelling of 6676387821 in words is "six billion, six hundred seventy-six million, three hundred eighty-seven thousand, eight hundred twenty-one".