664557300644541 has 16 divisors (see below), whose sum is σ = 886134710655744. Its totient is φ = 443009046441024.

The previous prime is 664557300644473. The next prime is 664557300644569. The reversal of 664557300644541 is 145446003755466.

It is not a de Polignac number, because 664557300644541 - 2²⁶ = 664557233535677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664557300646541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5325641436 + ... + 5325766218.

It is an arithmetic number, because the mean of its divisors is an integer number (55383419415984).

Almost surely, 2^{664557300644541} is an apocalyptic number.

It is an amenable number.

664557300644541 is a deficient number, since it is larger than the sum of its proper divisors (221577410011203).

664557300644541 is a wasteful number, since it uses less digits than its factorization.

664557300644541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227380.

The product of its (nonzero) digits is 145152000, while the sum is 60.

The spelling of 664557300644541 in words is "six hundred sixty-four trillion, five hundred fifty-seven billion, three hundred million, six hundred forty-four thousand, five hundred forty-one".