664846 has 24 divisors (see below), whose sum is σ = 1238544. Its totient is φ = 262080.

The previous prime is 664843. The next prime is 664847. The reversal of 664846 is 648466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2226 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (51606).

2⁶⁶⁴⁸⁴⁶ is an apocalyptic number.

664846 is a deficient number, since it is larger than the sum of its proper divisors (573698).

664846 is a wasteful number, since it uses less digits than its factorization.

664846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 303 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 664846 is about 815.3808925895. The cubic root of 664846 is about 87.2784490277.

The spelling of 664846 in words is "six hundred sixty-four thousand, eight hundred forty-six".