6481779 has 8 divisors (see below), whose sum is σ = 8659200. Its totient is φ = 4312776.

The previous prime is 6481763. The next prime is 6481789. The reversal of 6481779 is 9771846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6481779 - 2⁴ = 6481763 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

6481779 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6481779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6481729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7 + ... + 3600.

It is an arithmetic number, because the mean of its divisors is an integer number (1082400).

Almost surely, 2^6481779 is an apocalyptic number.

6481779 is a deficient number, since it is larger than the sum of its proper divisors (2177421).

6481779 is a wasteful number, since it uses less digits than its factorization.

6481779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4209.

The product of its digits is 84672, while the sum is 42.

The square root of 6481779 is about 2545.9338168931. The cubic root of 6481779 is about 186.4510098043.

It can be divided in two parts, 6481 and 779, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6481779 in words is "six million, four hundred eighty-one thousand, seven hundred seventy-nine".