664476 has 12 divisors (see below), whose sum is σ = 1550472. Its totient is φ = 221488.

The previous prime is 664471. The next prime is 664507. The reversal of 664476 is 674466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664476.

It is not an unprimeable number, because it can be changed into a prime (664471) 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, 27675 + ... + 27698.

It is an arithmetic number, because the mean of its divisors is an integer number (129206).

2⁶⁶⁴⁴⁷⁶ is an apocalyptic number.

It is an amenable number.

664476 is an abundant number, since it is smaller than the sum of its proper divisors (885996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664476 is a wasteful number, since it uses less digits than its factorization.

664476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55380 (or 55378 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 664476 is about 815.1539731854. The cubic root of 664476 is about 87.2622552934.

The spelling of 664476 in words is "six hundred sixty-four thousand, four hundred seventy-six".