6781616774 has 8 divisors (see below), whose sum is σ = 10408993320. Its totient is φ = 3311952336.

The previous prime is 6781616773. The next prime is 6781616783. The reversal of 6781616774 is 4776161876.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781616773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39427919 + ... + 39428090.

It is an arithmetic number, because the mean of its divisors is an integer number (1301124165).

Almost surely, 2^6781616774 is an apocalyptic number.

6781616774 is a deficient number, since it is larger than the sum of its proper divisors (3627376546).

6781616774 is a wasteful number, since it uses less digits than its factorization.

6781616774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78856054.

The product of its digits is 2370816, while the sum is 53.

The square root of 6781616774 is about 82350.5723963106. The cubic root of 6781616774 is about 1892.8276937850.

The spelling of 6781616774 in words is "six billion, seven hundred eighty-one million, six hundred sixteen thousand, seven hundred seventy-four".