6677777783881 has 4 divisors (see below), whose sum is σ = 6715083805200. Its totient is φ = 6640471762564.

The previous prime is 6677777783857. The next prime is 6677777783893. The reversal of 6677777783881 is 1883877777766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6677777783881 is a prime.

It is a super-2 number, since 2×6677777783881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6677777783795 and 6677777783804.

It is not an unprimeable number, because it can be changed into a prime (6677777783801) 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, 18653010391 + ... + 18653010748.

It is an arithmetic number, because the mean of its divisors is an integer number (1678770951300).

Almost surely, 2^{6677777783881} is an apocalyptic number.

It is an amenable number.

6677777783881 is a deficient number, since it is larger than the sum of its proper divisors (37306021319).

6677777783881 is a wasteful number, since it uses less digits than its factorization.

6677777783881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37306021318.

The product of its digits is 6505519104, while the sum is 82.

The spelling of 6677777783881 in words is "six trillion, six hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred eighty-three thousand, eight hundred eighty-one".