6820077638 has 24 divisors (see below), whose sum is σ = 11353886544. Its totient is φ = 3069926640.

The previous prime is 6820077631. The next prime is 6820077643. The reversal of 6820077638 is 8367700286.

It is a junction number, because it is equal to n+sod(n) for n = 6820077592 and 6820077601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820077631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111881 + ... + 161732.

It is an arithmetic number, because the mean of its divisors is an integer number (473078606).

Almost surely, 2^6820077638 is an apocalyptic number.

6820077638 is a deficient number, since it is larger than the sum of its proper divisors (4533808906).

6820077638 is a wasteful number, since it uses less digits than its factorization.

6820077638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273740 (or 273729 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 6820077638 is about 82583.7613456786. The cubic root of 6820077638 is about 1896.3992411393.

The spelling of 6820077638 in words is "six billion, eight hundred twenty million, seventy-seven thousand, six hundred thirty-eight".