663439465 has 16 divisors (see below), whose sum is σ = 858666816. Its totient is φ = 489182400.

The previous prime is 663439457. The next prime is 663439471. The reversal of 663439465 is 564934366.

It is not a de Polignac number, because 663439465 - 2³ = 663439457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37530 + ... + 52300.

It is an arithmetic number, because the mean of its divisors is an integer number (53666676).

Almost surely, 2^663439465 is an apocalyptic number.

663439465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663439465 is a deficient number, since it is larger than the sum of its proper divisors (195227351).

663439465 is a wasteful number, since it uses less digits than its factorization.

663439465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15480.

The product of its digits is 1399680, while the sum is 46.

The square root of 663439465 is about 25757.3186686813. The cubic root of 663439465 is about 872.1685738854.

The spelling of 663439465 in words is "six hundred sixty-three million, four hundred thirty-nine thousand, four hundred sixty-five".