2705680687 has 8 divisors (see below), whose sum is σ = 2794498704. Its totient is φ = 2618261568.

The previous prime is 2705680669. The next prime is 2705680697. The reversal of 2705680687 is 7860865072.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2705680687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2705680687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2705680667) 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, 345793 + ... + 353530.

It is an arithmetic number, because the mean of its divisors is an integer number (349312338).

Almost surely, 2^2705680687 is an apocalyptic number.

2705680687 is a deficient number, since it is larger than the sum of its proper divisors (88818017).

2705680687 is an equidigital number, since it uses as much as digits as its factorization.

2705680687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699449.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 2705680687 is about 52016.1579415474. The cubic root of 2705680687 is about 1393.4525368599.

The spelling of 2705680687 in words is "two billion, seven hundred five million, six hundred eighty thousand, six hundred eighty-seven".