6426779 has 4 divisors (see below), whose sum is σ = 6499080. Its totient is φ = 6354480.

The previous prime is 6426757. The next prime is 6426781. The reversal of 6426779 is 9776246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9776246 = 2 ⋅4888123.

It is a cyclic number.

It is not a de Polignac number, because 6426779 - 2⁸ = 6426523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6426379) 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, 36017 + ... + 36194.

It is an arithmetic number, because the mean of its divisors is an integer number (1624770).

Almost surely, 2^6426779 is an apocalyptic number.

6426779 is a deficient number, since it is larger than the sum of its proper divisors (72301).

6426779 is an equidigital number, since it uses as much as digits as its factorization.

6426779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72300.

The product of its digits is 127008, while the sum is 41.

The square root of 6426779 is about 2535.1092678620. The cubic root of 6426779 is about 185.9221453177.

It can be divided in two parts, 64267 and 79, that added together give a palindrome (64346).

The spelling of 6426779 in words is "six million, four hundred twenty-six thousand, seven hundred seventy-nine".