663465 has 16 divisors (see below), whose sum is σ = 1158336. Its totient is φ = 321600.

The previous prime is 663463. The next prime is 663517. The reversal of 663465 is 564366.

It is not a de Polignac number, because 663465 - 2¹ = 663463 is a prime.

663465 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (663463) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1846 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (72396).

2⁶⁶³⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

663465 is a deficient number, since it is larger than the sum of its proper divisors (494871).

663465 is a wasteful number, since it uses less digits than its factorization.

663465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040.

The product of its digits is 12960, while the sum is 30.

The square root of 663465 is about 814.5336088830. The cubic root of 663465 is about 87.2179763321.

Subtracting from 663465 its reverse (564366), we obtain a palindrome (99099).

It can be divided in two parts, 663 and 465, that added together give a triangular number (1128 = T₄₇).

The spelling of 663465 in words is "six hundred sixty-three thousand, four hundred sixty-five".