687790376676 has 36 divisors (see below), whose sum is σ = 1872318248892. Its totient is φ = 211627808064.

The previous prime is 687790376597. The next prime is 687790376687. The reversal of 687790376676 is 676673097786.

It can be written as a sum of positive squares in 2 ways, for example, as 99209880576 + 588580496100 = 314976^2 + 767190^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×687790376676² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 734818311 + ... + 734819246.

It is an arithmetic number, because the mean of its divisors is an integer number (52008840247).

Almost surely, 2^687790376676 is an apocalyptic number.

It is an amenable number.

687790376676 is an abundant number, since it is smaller than the sum of its proper divisors (1184527872216).

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

687790376676 is a wasteful number, since it uses less digits than its factorization.

687790376676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469637580 (or 1469637575 counting only the distinct ones).

The product of its (nonzero) digits is 672126336, while the sum is 72.

The spelling of 687790376676 in words is "six hundred eighty-seven billion, seven hundred ninety million, three hundred seventy-six thousand, six hundred seventy-six".