6689389172 has 12 divisors (see below), whose sum is σ = 11718931140. Its totient is φ = 3341123136.

The previous prime is 6689389171. The next prime is 6689389247. The reversal of 6689389172 is 2719839866.

It can be written as a sum of positive squares in 2 ways, for example, as 1834922896 + 4854466276 = 42836^2 + 69674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689389171) 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, 888647 + ... + 896142.

It is an arithmetic number, because the mean of its divisors is an integer number (976577595).

Almost surely, 2^6689389172 is an apocalyptic number.

It is an amenable number.

6689389172 is a deficient number, since it is larger than the sum of its proper divisors (5029541968).

6689389172 is a wasteful number, since it uses less digits than its factorization.

6689389172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785730 (or 1785728 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The square root of 6689389172 is about 81788.6860879914. The cubic root of 6689389172 is about 1884.2079026281.

The spelling of 6689389172 in words is "six billion, six hundred eighty-nine million, three hundred eighty-nine thousand, one hundred seventy-two".