664581413433 has 16 divisors (see below), whose sum is σ = 1012764262400. Its totient is φ = 379735016976.

The previous prime is 664581413407. The next prime is 664581413443. The reversal of 664581413433 is 334314185466.

664581413433 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 664581413433 - 2¹⁶ = 664581347897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664581413443) 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, 755833 + ... + 1378566.

It is an arithmetic number, because the mean of its divisors is an integer number (63297766400).

Almost surely, 2^664581413433 is an apocalyptic number.

It is an amenable number.

664581413433 is a deficient number, since it is larger than the sum of its proper divisors (348182848967).

664581413433 is a wasteful number, since it uses less digits than its factorization.

664581413433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149236.

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

Adding to 664581413433 its reverse (334314185466), we get a palindrome (998895598899).

The spelling of 664581413433 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred thirteen thousand, four hundred thirty-three".