663850 has 48 divisors (see below), whose sum is σ = 1446336. Its totient is φ = 224000.

The previous prime is 663827. The next prime is 663853. The reversal of 663850 is 58366.

663850 is nontrivially palindromic in base 16.

It is not an unprimeable number, because it can be changed into a prime (663853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9315 + ... + 9385.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁶⁶³⁸⁵⁰ is an apocalyptic number.

663850 is an abundant number, since it is smaller than the sum of its proper divisors (782486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663850 is a wasteful number, since it uses less digits than its factorization.

663850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 663850 is about 814.7699061698. The cubic root of 663850 is about 87.2348435508.

It can be divided in two parts, 66 and 3850, that added together give a triangular number (3916 = T₈₈).

The spelling of 663850 in words is "six hundred sixty-three thousand, eight hundred fifty".