6778240465 has 8 divisors (see below), whose sum is σ = 8139573288. Its totient is φ = 5418802560.

The previous prime is 6778240433. The next prime is 6778240487. The reversal of 6778240465 is 5640428776.

It can be written as a sum of positive squares in 4 ways, for example, as 3077586576 + 3700653889 = 55476^2 + 60833^2 .

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

It is not a de Polignac number, because 6778240465 - 2⁵ = 6778240433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465846 + ... + 480175.

It is an arithmetic number, because the mean of its divisors is an integer number (1017446661).

Almost surely, 2^6778240465 is an apocalyptic number.

It is an amenable number.

6778240465 is a deficient number, since it is larger than the sum of its proper divisors (1361332823).

6778240465 is a wasteful number, since it uses less digits than its factorization.

6778240465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947459.

The product of its (nonzero) digits is 2257920, while the sum is 49.

The square root of 6778240465 is about 82330.0702356071. The cubic root of 6778240465 is about 1892.5135193407.

The spelling of 6778240465 in words is "six billion, seven hundred seventy-eight million, two hundred forty thousand, four hundred sixty-five".