6780684518 has 4 divisors (see below), whose sum is σ = 10171026780. Its totient is φ = 3390342258.

The previous prime is 6780684473. The next prime is 6780684523. The reversal of 6780684518 is 8154860876.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6780684518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1695171128 + ... + 1695171131.

It is an arithmetic number, because the mean of its divisors is an integer number (2542756695).

Almost surely, 2^6780684518 is an apocalyptic number.

6780684518 is a deficient number, since it is larger than the sum of its proper divisors (3390342262).

6780684518 is a wasteful number, since it uses less digits than its factorization.

6780684518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390342261.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The square root of 6780684518 is about 82344.9119132445. The cubic root of 6780684518 is about 1892.7409553322.

The spelling of 6780684518 in words is "six billion, seven hundred eighty million, six hundred eighty-four thousand, five hundred eighteen".