6740422561 has 4 divisors (see below), whose sum is σ = 6746073732. Its totient is φ = 6734771392.

The previous prime is 6740422543. The next prime is 6740422567. The reversal of 6740422561 is 1652240476.

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 4607830161 + 2132592400 = 67881^2 + 46180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6740422561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6740422561.

It is not an unprimeable number, because it can be changed into a prime (6740422567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823796 + ... + 2826181.

It is an arithmetic number, because the mean of its divisors is an integer number (1686518433).

Almost surely, 2^6740422561 is an apocalyptic number.

It is an amenable number.

6740422561 is a deficient number, since it is larger than the sum of its proper divisors (5651171).

6740422561 is a wasteful number, since it uses less digits than its factorization.

6740422561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651170.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 6740422561 is about 82100.0764981373. The cubic root of 6740422561 is about 1888.9873134627.

The spelling of 6740422561 in words is "six billion, seven hundred forty million, four hundred twenty-two thousand, five hundred sixty-one".