687061668174 has 64 divisors (see below), whose sum is σ = 1586511747072. Its totient is φ = 194294016000.

The previous prime is 687061668149. The next prime is 687061668179. The reversal of 687061668174 is 471866160786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687061668179) by changing a digit.

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, 13281339 + ... + 13332969.

It is an arithmetic number, because the mean of its divisors is an integer number (24789246048).

Almost surely, 2^687061668174 is an apocalyptic number.

687061668174 is an abundant number, since it is smaller than the sum of its proper divisors (899450078898).

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

687061668174 is a wasteful number, since it uses less digits than its factorization.

687061668174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54881.

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 687061668174 in words is "six hundred eighty-seven billion, sixty-one million, six hundred sixty-eight thousand, one hundred seventy-four".