663226 has 4 divisors (see below), whose sum is σ = 994842. Its totient is φ = 331612.

The previous prime is 663209. The next prime is 663239. The reversal of 663226 is 622366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622366 = 2 ⋅311183.

It can be written as a sum of positive squares in only one way, i.e., 564001 + 99225 = 751^2 + 315^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 663226.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165805 + ... + 165808.

2⁶⁶³²²⁶ is an apocalyptic number.

663226 is a deficient number, since it is larger than the sum of its proper divisors (331616).

663226 is a wasteful number, since it uses less digits than its factorization.

663226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331615.

The product of its digits is 2592, while the sum is 25.

The square root of 663226 is about 814.3868859455. The cubic root of 663226 is about 87.2075022303.

The spelling of 663226 in words is "six hundred sixty-three thousand, two hundred twenty-six".