2678006065 has 12 divisors (see below), whose sum is σ = 3738278196. Its totient is φ = 1836346848.

The previous prime is 2678006063. The next prime is 2678006087. The reversal of 2678006065 is 5606008762.

It can be written as a sum of positive squares in 2 ways, for example, as 638219169 + 2039786896 = 25263^2 + 45164^2 .

It is not a de Polignac number, because 2678006065 - 2¹ = 2678006063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678006063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5465074 + ... + 5465563.

It is an arithmetic number, because the mean of its divisors is an integer number (311523183).

Almost surely, 2^2678006065 is an apocalyptic number.

It is an amenable number.

2678006065 is a deficient number, since it is larger than the sum of its proper divisors (1060272131).

2678006065 is a wasteful number, since it uses less digits than its factorization.

2678006065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10930656 (or 10930649 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 2678006065 is about 51749.4547314269. The cubic root of 2678006065 is about 1388.6853441294.

The spelling of 2678006065 in words is "two billion, six hundred seventy-eight million, six thousand, sixty-five".