687326066730 has 128 divisors (see below), whose sum is σ = 1838550009600. Its totient is φ = 182719660032.

The previous prime is 687326066711. The next prime is 687326066741. The reversal of 687326066730 is 37660623786.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 63 ways as a sum of consecutive naturals, for example, 255605226 + ... + 255607914.

It is an arithmetic number, because the mean of its divisors is an integer number (14363671950).

Almost surely, 2^687326066730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687326066730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919275004800).

687326066730 is an abundant number, since it is smaller than the sum of its proper divisors (1151223942870).

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

687326066730 is a wasteful number, since it uses less digits than its factorization.

687326066730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285 (or 5279 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 687326066730 in words is "six hundred eighty-seven billion, three hundred twenty-six million, sixty-six thousand, seven hundred thirty".