2686606889 has 8 divisors (see below), whose sum is σ = 2765979720. Its totient is φ = 2607590016.

The previous prime is 2686606837. The next prime is 2686606907. The reversal of 2686606889 is 9886066862.

It can be written as a sum of positive squares in 4 ways, for example, as 2198859664 + 487747225 = 46892^2 + 22085^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2686606889 - 2²⁰ = 2685558313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2686606829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73634 + ... + 103899.

It is an arithmetic number, because the mean of its divisors is an integer number (345747465).

Almost surely, 2^2686606889 is an apocalyptic number.

It is an amenable number.

2686606889 is a deficient number, since it is larger than the sum of its proper divisors (79372831).

2686606889 is a wasteful number, since it uses less digits than its factorization.

2686606889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177979.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The square root of 2686606889 is about 51832.4887401714. The cubic root of 2686606889 is about 1390.1704135216.

The spelling of 2686606889 in words is "two billion, six hundred eighty-six million, six hundred six thousand, eight hundred eighty-nine".