6786989896877 has 4 divisors (see below), whose sum is σ = 6898252026396. Its totient is φ = 6675727767360.

The previous prime is 6786989896861. The next prime is 6786989896901. The reversal of 6786989896877 is 7786989896876.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1702591767556 + 5084398129321 = 1304834^2 + 2254861^2 .

It is a cyclic number.

It is not a de Polignac number, because 6786989896877 - 2⁴ = 6786989896861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6786989896807) 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, 55631064668 + ... + 55631064789.

It is an arithmetic number, because the mean of its divisors is an integer number (1724563006599).

Almost surely, 2^{6786989896877} is an apocalyptic number.

It is an amenable number.

6786989896877 is a deficient number, since it is larger than the sum of its proper divisors (111262129519).

6786989896877 is a wasteful number, since it uses less digits than its factorization.

6786989896877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111262129518.

The product of its digits is 221225582592, while the sum is 98.

Subtracting 6786989896877 from its reverse (7786989896876), we obtain a palindrome (999999999999).

The spelling of 6786989896877 in words is "six trillion, seven hundred eighty-six billion, nine hundred eighty-nine million, eight hundred ninety-six thousand, eight hundred seventy-seven".