664876 has 6 divisors (see below), whose sum is σ = 1163540. Its totient is φ = 332436.

The previous prime is 664849. The next prime is 664879. The reversal of 664876 is 678466.

It is not an unprimeable number, because it can be changed into a prime (664879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83106 + ... + 83113.

2⁶⁶⁴⁸⁷⁶ is an apocalyptic number.

It is an amenable number.

664876 is a deficient number, since it is larger than the sum of its proper divisors (498664).

664876 is a wasteful number, since it uses less digits than its factorization.

664876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166223 (or 166221 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 664876 is about 815.3992886924. The cubic root of 664876 is about 87.2797617699.

It can be divided in two parts, 6648 and 76, that added together give a square (6724 = 82²).

The spelling of 664876 in words is "six hundred sixty-four thousand, eight hundred seventy-six".