663351 has 16 divisors (see below), whose sum is σ = 969696. Its totient is φ = 400896.

The previous prime is 663349. The next prime is 663359. The reversal of 663351 is 153366.

It is not a de Polignac number, because 663351 - 2¹ = 663349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2731 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (60606).

2⁶⁶³³⁵¹ is an apocalyptic number.

663351 is a deficient number, since it is larger than the sum of its proper divisors (306345).

663351 is a wasteful number, since it uses less digits than its factorization.

663351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322.

The product of its digits is 1620, while the sum is 24.

The square root of 663351 is about 814.4636271805. The cubic root of 663351 is about 87.2129806308.

The spelling of 663351 in words is "six hundred sixty-three thousand, three hundred fifty-one".