687866332140 has 240 divisors, whose sum is σ = 2460549988512. Its totient is φ = 159360804864.

The previous prime is 687866332121. The next prime is 687866332147. The reversal of 687866332140 is 41233668786.

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

It is not an unprimeable number, because it can be changed into a prime (687866332147) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 602634 + ... + 1318673.

Almost surely, 2^687866332140 is an apocalyptic number.

687866332140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687866332140 is an abundant number, since it is smaller than the sum of its proper divisors (1772683656372).

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

687866332140 is a wasteful number, since it uses less digits than its factorization.

687866332140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921358 (or 1921347 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 687866332140 in words is "six hundred eighty-seven billion, eight hundred sixty-six million, three hundred thirty-two thousand, one hundred forty".