664416495 has 24 divisors (see below), whose sum is σ = 1153663056. Its totient is φ = 353737728.

The previous prime is 664416451. The next prime is 664416497. The reversal of 664416495 is 594614466.

It is a happy number.

664416495 is a `hidden beast` number, since 66 + 441 + 64 + 95 = 666.

It is not a de Polignac number, because 664416495 - 2¹⁶ = 664350959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664416495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664416497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13839 + ... + 38991.

It is an arithmetic number, because the mean of its divisors is an integer number (48069294).

Almost surely, 2^664416495 is an apocalyptic number.

664416495 is a deficient number, since it is larger than the sum of its proper divisors (489246561).

664416495 is a wasteful number, since it uses less digits than its factorization.

664416495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25751 (or 25748 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 664416495 is about 25776.2777568834. The cubic root of 664416495 is about 872.5965038590.

The spelling of 664416495 in words is "six hundred sixty-four million, four hundred sixteen thousand, four hundred ninety-five".