664018533 has 16 divisors (see below), whose sum is σ = 1026503040. Its totient is φ = 423431712.

The previous prime is 664018519. The next prime is 664018549. The reversal of 664018533 is 335810466.

664018533 is a `hidden beast` number, since 6 + 640 + 1 + 8 + 5 + 3 + 3 = 666.

664018533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664018533 - 2⁵ = 664018501 is a prime.

It is a super-2 number, since 2×664018533² = 881841224334944178, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664018573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534016 + ... + 535257.

It is an arithmetic number, because the mean of its divisors is an integer number (64156440).

Almost surely, 2^664018533 is an apocalyptic number.

It is an amenable number.

664018533 is a deficient number, since it is larger than the sum of its proper divisors (362484507).

664018533 is a wasteful number, since it uses less digits than its factorization.

664018533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069305 (or 1069299 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 664018533 is about 25768.5570608833. The cubic root of 664018533 is about 872.4222509078.

Adding to 664018533 its reverse (335810466), we get a palindrome (999828999).

The spelling of 664018533 in words is "six hundred sixty-four million, eighteen thousand, five hundred thirty-three".