664336541 has 16 divisors (see below), whose sum is σ = 765523968. Its totient is φ = 570855600.

The previous prime is 664336513. The next prime is 664336549. The reversal of 664336541 is 145633466.

It is a cyclic number.

It is not a de Polignac number, because 664336541 - 2¹⁰ = 664335517 is a prime.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 664336495 and 664336504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664336549) 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 15 ways as a sum of consecutive naturals, for example, 7991 + ... + 37316.

It is an arithmetic number, because the mean of its divisors is an integer number (47845248).

Almost surely, 2^664336541 is an apocalyptic number.

It is an amenable number.

664336541 is a deficient number, since it is larger than the sum of its proper divisors (101187427).

664336541 is a wasteful number, since it uses less digits than its factorization.

664336541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45392.

The product of its digits is 155520, while the sum is 38.

The square root of 664336541 is about 25774.7267880767. The cubic root of 664336541 is about 872.5615005239.

The spelling of 664336541 in words is "six hundred sixty-four million, three hundred thirty-six thousand, five hundred forty-one".