687466646 has 8 divisors (see below), whose sum is σ = 1032781104. Its totient is φ = 343206280.

The previous prime is 687466631. The next prime is 687466649. The reversal of 687466646 is 646664786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×687466646² = 945220778724978632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687466649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261890 + ... + 264501.

It is an arithmetic number, because the mean of its divisors is an integer number (129097638).

Almost surely, 2^687466646 is an apocalyptic number.

687466646 is a deficient number, since it is larger than the sum of its proper divisors (345314458).

687466646 is a wasteful number, since it uses less digits than its factorization.

687466646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527046.

The product of its digits is 6967296, while the sum is 53.

The square root of 687466646 is about 26219.5851607153. The cubic root of 687466646 is about 882.5728107233.

The spelling of 687466646 in words is "six hundred eighty-seven million, four hundred sixty-six thousand, six hundred forty-six".