6945810065 has 4 divisors (see below), whose sum is σ = 8334972084. Its totient is φ = 5556648048.

The previous prime is 6945810049. The next prime is 6945810073. The reversal of 6945810065 is 5600185496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2625640081 + 4320169984 = 51241^2 + 65728^2 .

It is a cyclic number.

It is not a de Polignac number, because 6945810065 - 2⁴ = 6945810049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6945809998 and 6945810025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694581002 + ... + 694581011.

It is an arithmetic number, because the mean of its divisors is an integer number (2083743021).

Almost surely, 2^6945810065 is an apocalyptic number.

It is an amenable number.

6945810065 is a deficient number, since it is larger than the sum of its proper divisors (1389162019).

6945810065 is a wasteful number, since it uses less digits than its factorization.

6945810065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389162018.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 6945810065 is about 83341.5266538837. The cubic root of 6945810065 is about 1907.9821223495.

The spelling of 6945810065 in words is "six billion, nine hundred forty-five million, eight hundred ten thousand, sixty-five".