6677779 has 4 divisors (see below), whose sum is σ = 6683040. Its totient is φ = 6672520.

The previous prime is 6677777. The next prime is 6677789. The reversal of 6677779 is 9777766.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6677779 - 2¹ = 6677777 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6677777) 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, 582 + ... + 3700.

It is an arithmetic number, because the mean of its divisors is an integer number (1670760).

Almost surely, 2^6677779 is an apocalyptic number.

6677779 is a deficient number, since it is larger than the sum of its proper divisors (5261).

6677779 is a wasteful number, since it uses less digits than its factorization.

6677779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260.

The product of its digits is 777924, while the sum is 49.

The square root of 6677779 is about 2584.1398955939. The cubic root of 6677779 is about 188.3117187888.

The spelling of 6677779 in words is "six million, six hundred seventy-seven thousand, seven hundred seventy-nine".