664498 has 8 divisors (see below), whose sum is σ = 1009008. Its totient is φ = 328164.

The previous prime is 664471. The next prime is 664507. The reversal of 664498 is 894466.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (126126).

2⁶⁶⁴⁴⁹⁸ is an apocalyptic number.

664498 is a deficient number, since it is larger than the sum of its proper divisors (344510).

664498 is a wasteful number, since it uses less digits than its factorization.

664498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088.

The product of its digits is 41472, while the sum is 37.

The square root of 664498 is about 815.1674674568. The cubic root of 664498 is about 87.2632183321.

The spelling of 664498 in words is "six hundred sixty-four thousand, four hundred ninety-eight".