6456779 has 6 divisors (see below), whose sum is σ = 7511004. Its totient is φ = 5534340.

The previous prime is 6456757. The next prime is 6456781. The reversal of 6456779 is 9776546.

It is not a de Polignac number, because 6456779 - 2¹⁶ = 6391243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6456739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65837 + ... + 65934.

It is an arithmetic number, because the mean of its divisors is an integer number (1251834).

Almost surely, 2^6456779 is an apocalyptic number.

6456779 is a deficient number, since it is larger than the sum of its proper divisors (1054225).

6456779 is a wasteful number, since it uses less digits than its factorization.

6456779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131785 (or 131778 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 6456779 is about 2541.0192836734. The cubic root of 6456779 is about 186.2109892321.

It can be divided in two parts, 64567 and 79, that added together give a palindrome (64646).

The spelling of 6456779 in words is "six million, four hundred fifty-six thousand, seven hundred seventy-nine".