6725661785 has 16 divisors (see below), whose sum is σ = 8099317632. Its totient is φ = 5361552000.

The previous prime is 6725661779. The next prime is 6725661821. The reversal of 6725661785 is 5871665276.

It is not a de Polignac number, because 6725661785 - 2⁶ = 6725661721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1894382 + ... + 1897928.

It is an arithmetic number, because the mean of its divisors is an integer number (506207352).

Almost surely, 2^6725661785 is an apocalyptic number.

It is an amenable number.

6725661785 is a deficient number, since it is larger than the sum of its proper divisors (1373655847).

6725661785 is a wasteful number, since it uses less digits than its factorization.

6725661785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784.

The product of its digits is 4233600, while the sum is 53.

The square root of 6725661785 is about 82010.1322093801. The cubic root of 6725661785 is about 1887.6074149651.

The spelling of 6725661785 in words is "six billion, seven hundred twenty-five million, six hundred sixty-one thousand, seven hundred eighty-five".