664204887 has 16 divisors (see below), whose sum is σ = 988960000. Its totient is φ = 440574552.

The previous prime is 664204883. The next prime is 664204889. The reversal of 664204887 is 788402466.

It is not a de Polignac number, because 664204887 - 2² = 664204883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664204883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56437 + ... + 67182.

It is an arithmetic number, because the mean of its divisors is an integer number (61810000).

Almost surely, 2^664204887 is an apocalyptic number.

664204887 is a deficient number, since it is larger than the sum of its proper divisors (324755113).

664204887 is a wasteful number, since it uses less digits than its factorization.

664204887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123827 (or 123821 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 664204887 is about 25772.1727256357. The cubic root of 664204887 is about 872.5038571489.

The spelling of 664204887 in words is "six hundred sixty-four million, two hundred four thousand, eight hundred eighty-seven".