664016 has 20 divisors (see below), whose sum is σ = 1315392. Its totient is φ = 324576.

The previous prime is 664009. The next prime is 664019. The reversal of 664016 is 610466.

It is a junction number, because it is equal to n+sod(n) for n = 663982 and 664000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664019) by changing a digit.

664016 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311 + ... + 1193.

2⁶⁶⁴⁰¹⁶ is an apocalyptic number.

It is an amenable number.

664016 is a deficient number, since it is larger than the sum of its proper divisors (651376).

664016 is a wasteful number, since it uses less digits than its factorization.

664016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 664016 is about 814.8717690533. The cubic root of 664016 is about 87.2421141577.

The spelling of 664016 in words is "six hundred sixty-four thousand, sixteen".