687432240660 has 96 divisors (see below), whose sum is σ = 2119417477632. Its totient is φ = 165092744320.

The previous prime is 687432240653. The next prime is 687432240673. The reversal of 687432240660 is 66042234786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4796502 + ... + 4937741.

It is an arithmetic number, because the mean of its divisors is an integer number (22077265392).

Almost surely, 2^687432240660 is an apocalyptic number.

687432240660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687432240660 is an abundant number, since it is smaller than the sum of its proper divisors (1431985236972).

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

687432240660 is a wasteful number, since it uses less digits than its factorization.

687432240660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9734373 (or 9734371 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 48.

The spelling of 687432240660 in words is "six hundred eighty-seven billion, four hundred thirty-two million, two hundred forty thousand, six hundred sixty".