6705647789 has 16 divisors (see below), whose sum is σ = 7298050560. Its totient is φ = 6137856000.

The previous prime is 6705647761. The next prime is 6705647801. The reversal of 6705647789 is 9877465076.

It is a cyclic number.

It is not a de Polignac number, because 6705647789 - 2¹⁶ = 6705582253 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 (6705647719) 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, 368669 + ... + 386429.

It is an arithmetic number, because the mean of its divisors is an integer number (456128160).

Almost surely, 2^6705647789 is an apocalyptic number.

It is an amenable number.

6705647789 is a deficient number, since it is larger than the sum of its proper divisors (592402771).

6705647789 is a wasteful number, since it uses less digits than its factorization.

6705647789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18452.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The square root of 6705647789 is about 81888.0198136455. The cubic root of 6705647789 is about 1885.7331953007.

The spelling of 6705647789 in words is "six billion, seven hundred five million, six hundred forty-seven thousand, seven hundred eighty-nine".