6716783781 has 12 divisors (see below), whose sum is σ = 9703143840. Its totient is φ = 4477337640.

The previous prime is 6716783767. The next prime is 6716783791. The reversal of 6716783781 is 1873876176.

It is not a de Polignac number, because 6716783781 - 2²³ = 6708395173 is a prime.

It is a super-2 number, since 2×6716783781² = 90230368721409311922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6716783761) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 49336 + ... + 125966.

It is an arithmetic number, because the mean of its divisors is an integer number (808595320).

Almost surely, 2^6716783781 is an apocalyptic number.

It is an amenable number.

6716783781 is a deficient number, since it is larger than the sum of its proper divisors (2986360059).

6716783781 is a wasteful number, since it uses less digits than its factorization.

6716783781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86376 (or 86373 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 6716783781 is about 81955.9868527004. The cubic root of 6716783781 is about 1886.7764897794.

The spelling of 6716783781 in words is "six billion, seven hundred sixteen million, seven hundred eighty-three thousand, seven hundred eighty-one".