2686603806 has 48 divisors (see below), whose sum is σ = 6210526608. Its totient is φ = 836409600.

The previous prime is 2686603783. The next prime is 2686603807. The reversal of 2686603806 is 6083066862.

2686603806 is a `hidden beast` number, since 268 + 6 + 6 + 0 + 380 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686603807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6576 + ... + 73596.

It is an arithmetic number, because the mean of its divisors is an integer number (129385971).

Almost surely, 2^2686603806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686603806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3105263304).

2686603806 is an abundant number, since it is smaller than the sum of its proper divisors (3523922802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2686603806 is a wasteful number, since it uses less digits than its factorization.

2686603806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67177 (or 67174 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 2686603806 is about 51832.4590001285. The cubic root of 2686603806 is about 1390.1698817607.

The spelling of 2686603806 in words is "two billion, six hundred eighty-six million, six hundred three thousand, eight hundred six".