663854 has 8 divisors (see below), whose sum is σ = 1022808. Its totient is φ = 322920.

The previous prime is 663853. The next prime is 663857. The reversal of 663854 is 458366.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 663854.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663854.

It is not an unprimeable number, because it can be changed into a prime (663853) 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, 4412 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (127851).

2⁶⁶³⁸⁵⁴ is an apocalyptic number.

663854 is a deficient number, since it is larger than the sum of its proper divisors (358954).

663854 is a wasteful number, since it uses less digits than its factorization.

663854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010.

The product of its digits is 17280, while the sum is 32.

The square root of 663854 is about 814.7723608469. The cubic root of 663854 is about 87.2350187604.

The spelling of 663854 in words is "six hundred sixty-three thousand, eight hundred fifty-four".