664126 has 8 divisors (see below), whose sum is σ = 1048680. Its totient is φ = 314568.

The previous prime is 664123. The next prime is 664133. The reversal of 664126 is 621466.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 664126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8701 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (131085).

2⁶⁶⁴¹²⁶ is an apocalyptic number.

664126 is a deficient number, since it is larger than the sum of its proper divisors (384554).

664126 is a wasteful number, since it uses less digits than its factorization.

664126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17498.

The product of its digits is 1728, while the sum is 25.

The square root of 664126 is about 814.9392615404. The cubic root of 664126 is about 87.2469313623.

The spelling of 664126 in words is "six hundred sixty-four thousand, one hundred twenty-six".