664414 has 4 divisors (see below), whose sum is σ = 996624. Its totient is φ = 332206.

The previous prime is 664403. The next prime is 664421. The reversal of 664414 is 414466.

664414 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

664414 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 as a sum of consecutive naturals, namely, 166102 + ... + 166105.

It is an arithmetic number, because the mean of its divisors is an integer number (249156).

2⁶⁶⁴⁴¹⁴ is an apocalyptic number.

664414 is a deficient number, since it is larger than the sum of its proper divisors (332210).

664414 is a wasteful number, since it uses less digits than its factorization.

664414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332209.

The product of its digits is 2304, while the sum is 25.

The square root of 664414 is about 815.1159426732. The cubic root of 664414 is about 87.2595411607.

The spelling of 664414 in words is "six hundred sixty-four thousand, four hundred fourteen".