6406710641 has 4 divisors (see below), whose sum is σ = 6408092784. Its totient is φ = 6405328500.

The previous prime is 6406710587. The next prime is 6406710647. The reversal of 6406710641 is 1460176046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406710641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406710647) 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, 684095 + ... + 693396.

It is an arithmetic number, because the mean of its divisors is an integer number (1602023196).

Almost surely, 2^6406710641 is an apocalyptic number.

It is an amenable number.

6406710641 is a deficient number, since it is larger than the sum of its proper divisors (1382143).

6406710641 is a wasteful number, since it uses less digits than its factorization.

6406710641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382142.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 6406710641 is about 80041.9305176980. The cubic root of 6406710641 is about 1857.2842241959.

Adding to 6406710641 its reverse (1460176046), we get a palindrome (7866886687).

The spelling of 6406710641 in words is "six billion, four hundred six million, seven hundred ten thousand, six hundred forty-one".