664234 has 4 divisors (see below), whose sum is σ = 996354. Its totient is φ = 332116.

The previous prime is 664211. The next prime is 664243. The reversal of 664234 is 432466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432466 = 2 ⋅216233.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 9 = 815^2 + 3^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664199 and 664208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166057 + ... + 166060.

2⁶⁶⁴²³⁴ is an apocalyptic number.

664234 is a deficient number, since it is larger than the sum of its proper divisors (332120).

664234 is a wasteful number, since it uses less digits than its factorization.

664234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332119.

The product of its digits is 3456, while the sum is 25.

The square root of 664234 is about 815.0055214537. The cubic root of 664234 is about 87.2516604638.

It can be divided in two parts, 664 and 234, that added together give a palindrome (898).

The spelling of 664234 in words is "six hundred sixty-four thousand, two hundred thirty-four".