6981200065 has 16 divisors (see below), whose sum is σ = 9575952768. Its totient is φ = 4786240896.

The previous prime is 6981200047. The next prime is 6981200069. The reversal of 6981200065 is 5600021896.

It is a cyclic number.

It is not a de Polignac number, because 6981200065 - 2²¹ = 6979102913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981199997 and 6981200033.

It is not an unprimeable number, because it can be changed into a prime (6981200069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223074 + ... + 252436.

It is an arithmetic number, because the mean of its divisors is an integer number (598497048).

Almost surely, 2^6981200065 is an apocalyptic number.

It is an amenable number.

6981200065 is a deficient number, since it is larger than the sum of its proper divisors (2594752703).

6981200065 is a wasteful number, since it uses less digits than its factorization.

6981200065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36168.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 6981200065 is about 83553.5760156320. The cubic root of 6981200065 is about 1911.2171244229.

It can be divided in two parts, 6981 and 200065, that added together give a triangular number (207046 = T₆₄₃).

The spelling of 6981200065 in words is "six billion, nine hundred eighty-one million, two hundred thousand, sixty-five".