663446 has 8 divisors (see below), whose sum is σ = 1137360. Its totient is φ = 284328.

The previous prime is 663437. The next prime is 663463. The reversal of 663446 is 644366.

663446 = 44² + 45² + ... + 127².

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

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 23681 + ... + 23708.

It is an arithmetic number, because the mean of its divisors is an integer number (142170).

2⁶⁶³⁴⁴⁶ is an apocalyptic number.

663446 is a deficient number, since it is larger than the sum of its proper divisors (473914).

663446 is a wasteful number, since it uses less digits than its factorization.

663446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47398.

The product of its digits is 10368, while the sum is 29.

The square root of 663446 is about 814.5219456835. The cubic root of 663446 is about 87.2171437549.

The spelling of 663446 in words is "six hundred sixty-three thousand, four hundred forty-six".