664982 has 8 divisors (see below), whose sum is σ = 1002456. Its totient is φ = 330832.

The previous prime is 664973. The next prime is 664997. The reversal of 664982 is 289466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

664982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (125307).

2⁶⁶⁴⁹⁸² is an apocalyptic number.

664982 is a deficient number, since it is larger than the sum of its proper divisors (337474).

664982 is a wasteful number, since it uses less digits than its factorization.

664982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its digits is 20736, while the sum is 35.

The square root of 664982 is about 815.4642849322. The cubic root of 664982 is about 87.2843998092.

The spelling of 664982 in words is "six hundred sixty-four thousand, nine hundred eighty-two".