2686606380 has 120 divisors (see below), whose sum is σ = 8459822448. Its totient is φ = 713722752.

The previous prime is 2686606357. The next prime is 2686606393. The reversal of 2686606380 is 836066862.

2686606380 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 6 + 0 + 638 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 445747 + ... + 451733.

Almost surely, 2^2686606380 is an apocalyptic number.

2686606380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686606380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4229911224).

2686606380 is an abundant number, since it is smaller than the sum of its proper divisors (5773216068).

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

2686606380 is a wasteful number, since it uses less digits than its factorization.

2686606380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6274 counting only the distinct ones).

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

The square root of 2686606380 is about 51832.4838301234. The cubic root of 2686606380 is about 1390.1703257284.

The spelling of 2686606380 in words is "two billion, six hundred eighty-six million, six hundred six thousand, three hundred eighty".