663375 has 32 divisors (see below), whose sum is σ = 1160640. Its totient is φ = 336000.

The previous prime is 663371. The next prime is 663407. The reversal of 663375 is 573366.

663375 = T₃₄ + T₃₅ + ... + T₁₅₈.

663375 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663375 - 2² = 663371 is a prime.

Its product of digits (11340) is a multiple of the sum of its prime factors (108).

663375 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10845 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (36270).

2⁶⁶³³⁷⁵ is an apocalyptic number.

663375 is a deficient number, since it is larger than the sum of its proper divisors (497265).

663375 is a wasteful number, since it uses less digits than its factorization.

663375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its digits is 11340, while the sum is 30.

The square root of 663375 is about 814.4783606702. The cubic root of 663375 is about 87.2140324049.

Subtracting from 663375 its reverse (573366), we obtain a palindrome (90009).

The spelling of 663375 in words is "six hundred sixty-three thousand, three hundred seventy-five".