664466 has 8 divisors (see below), whose sum is σ = 1087344. Its totient is φ = 302020.

The previous prime is 664459. The next prime is 664471.

It is a happy number.

664466 is nontrivially palindromic in base 10.

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

It is an Ulam number.

It is a zygodrome in base 10.

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, 15080 + ... + 15123.

It is an arithmetic number, because the mean of its divisors is an integer number (135918).

2⁶⁶⁴⁴⁶⁶ is an apocalyptic number.

664466 is a deficient number, since it is larger than the sum of its proper divisors (422878).

664466 is a wasteful number, since it uses less digits than its factorization.

664466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30216.

The product of its digits is 20736, while the sum is 32.

The square root of 664466 is about 815.1478393519. The cubic root of 664466 is about 87.2618175415.

The spelling of 664466 in words is "six hundred sixty-four thousand, four hundred sixty-six".