687066255372 has 96 divisors (see below), whose sum is σ = 1846036942848. Its totient is φ = 194820378624.

The previous prime is 687066255329. The next prime is 687066255391. The reversal of 687066255372 is 273552660786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73266748 + ... + 73276124.

It is an arithmetic number, because the mean of its divisors is an integer number (19229551488).

Almost surely, 2^687066255372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687066255372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923018471424).

687066255372 is an abundant number, since it is smaller than the sum of its proper divisors (1158970687476).

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

687066255372 is a wasteful number, since it uses less digits than its factorization.

687066255372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15895 (or 15893 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 57.

The spelling of 687066255372 in words is "six hundred eighty-seven billion, sixty-six million, two hundred fifty-five thousand, three hundred seventy-two".