6776768643 has 8 divisors (see below), whose sum is σ = 9036210000. Its totient is φ = 4517586528.

The previous prime is 6776768617. The next prime is 6776768659. The reversal of 6776768643 is 3468676776.

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

It is not a de Polignac number, because 6776768643 - 2¹⁰ = 6776767619 is a prime.

It is a super-2 number, since 2×6776768643² = 91849186481496122898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6776768693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813 + ... + 116681.

It is an arithmetic number, because the mean of its divisors is an integer number (1129526250).

Almost surely, 2^6776768643 is an apocalyptic number.

6776768643 is a deficient number, since it is larger than the sum of its proper divisors (2259441357).

6776768643 is a wasteful number, since it uses less digits than its factorization.

6776768643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129621.

The product of its digits is 42674688, while the sum is 60.

The square root of 6776768643 is about 82321.1312057846. The cubic root of 6776768643 is about 1892.3765297743.

The spelling of 6776768643 in words is "six billion, seven hundred seventy-six million, seven hundred sixty-eight thousand, six hundred forty-three".