6406647717 has 8 divisors (see below), whose sum is σ = 8773067296. Its totient is φ = 4155663312.

The previous prime is 6406647697. The next prime is 6406647719. The reversal of 6406647717 is 7177466046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6406647717 - 2⁷ = 6406647589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406647719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28858663 + ... + 28858884.

It is an arithmetic number, because the mean of its divisors is an integer number (1096633412).

Almost surely, 2^6406647717 is an apocalyptic number.

It is an amenable number.

6406647717 is a deficient number, since it is larger than the sum of its proper divisors (2366419579).

6406647717 is a wasteful number, since it uses less digits than its factorization.

6406647717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57717587.

The product of its (nonzero) digits is 1185408, while the sum is 48.

The square root of 6406647717 is about 80041.5374477527. The cubic root of 6406647717 is about 1857.2781436895.

The spelling of 6406647717 in words is "six billion, four hundred six million, six hundred forty-seven thousand, seven hundred seventeen".