6783440068 has 6 divisors (see below), whose sum is σ = 11871020126. Its totient is φ = 3391720032.

The previous prime is 6783440033. The next prime is 6783440077. The reversal of 6783440068 is 8600443876.

It can be written as a sum of positive squares in only one way, i.e., 6374106244 + 409333824 = 79838^2 + 20232^2 .

It is a super-2 number, since 2×6783440068² = 92030118312295689248, which contains 22 as substring.

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, 847930005 + ... + 847930012.

Almost surely, 2^6783440068 is an apocalyptic number.

It is an amenable number.

6783440068 is a deficient number, since it is larger than the sum of its proper divisors (5087580058).

6783440068 is a wasteful number, since it uses less digits than its factorization.

6783440068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695860021 (or 1695860019 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 6783440068 is about 82361.6419700336. The cubic root of 6783440068 is about 1892.9973127341.

The spelling of 6783440068 in words is "six billion, seven hundred eighty-three million, four hundred forty thousand, sixty-eight".