6820405742 has 8 divisors (see below), whose sum is σ = 10255026600. Its totient is φ = 3402063544.

The previous prime is 6820405733. The next prime is 6820405771. The reversal of 6820405742 is 2475040286.

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

It is a junction number, because it is equal to n+sod(n) for n = 6820405696 and 6820405705.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4068617 + ... + 4070292.

It is an arithmetic number, because the mean of its divisors is an integer number (1281878325).

Almost surely, 2^6820405742 is an apocalyptic number.

6820405742 is a deficient number, since it is larger than the sum of its proper divisors (3434620858).

6820405742 is a wasteful number, since it uses less digits than its factorization.

6820405742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8139330.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 6820405742 is about 82585.7478140145. The cubic root of 6820405742 is about 1896.4296516533.

The spelling of 6820405742 in words is "six billion, eight hundred twenty million, four hundred five thousand, seven hundred forty-two".