687813604266 has 16 divisors (see below), whose sum is σ = 1448028640800. Its totient is φ = 217204296048.

The previous prime is 687813604237. The next prime is 687813604319. The reversal of 687813604266 is 662406318786.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3016726221 + ... + 3016726448.

It is an arithmetic number, because the mean of its divisors is an integer number (90501790050).

Almost surely, 2^687813604266 is an apocalyptic number.

687813604266 is an abundant number, since it is smaller than the sum of its proper divisors (760215036534).

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

687813604266 is a wasteful number, since it uses less digits than its factorization.

687813604266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033452693.

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 687813604266 in words is "six hundred eighty-seven billion, eight hundred thirteen million, six hundred four thousand, two hundred sixty-six".