646696 has 16 divisors (see below), whose sum is σ = 1221300. Its totient is φ = 321024.

The previous prime is 646687. The next prime is 646721. The reversal of 646696 is 696646.

646696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 617796 + 28900 = 786^2 + 170^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656 + ... + 2008.

2⁶⁴⁶⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

646696 is a deficient number, since it is larger than the sum of its proper divisors (574604).

646696 is a wasteful number, since it uses less digits than its factorization.

646696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 584 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 646696 is about 804.1741105010. The cubic root of 646696 is about 86.4768891448.

The spelling of 646696 in words is "six hundred forty-six thousand, six hundred ninety-six".