663864465 has 64 divisors (see below), whose sum is σ = 1225175040. Its totient is φ = 303575040.

The previous prime is 663864449. The next prime is 663864499. The reversal of 663864465 is 564468366.

It is not a de Polignac number, because 663864465 - 2⁴ = 663864449 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1150257 + ... + 1150833.

It is an arithmetic number, because the mean of its divisors is an integer number (19143360).

Almost surely, 2^663864465 is an apocalyptic number.

It is an amenable number.

663864465 is a deficient number, since it is larger than the sum of its proper divisors (561310575).

663864465 is a wasteful number, since it uses less digits than its factorization.

663864465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 2488320, while the sum is 48.

The square root of 663864465 is about 25765.5674301964. The cubic root of 663864465 is about 872.3547714919.

The spelling of 663864465 in words is "six hundred sixty-three million, eight hundred sixty-four thousand, four hundred sixty-five".