664841565741 has 8 divisors (see below), whose sum is σ = 886464151360. Its totient is φ = 443223345312.

The previous prime is 664841565709. The next prime is 664841565769. The reversal of 664841565741 is 147565148466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664841565741 - 2⁵ = 664841565709 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 (664841565701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717640 + ... + 1358193.

It is an arithmetic number, because the mean of its divisors is an integer number (110808018920).

Almost surely, 2^664841565741 is an apocalyptic number.

It is an amenable number.

664841565741 is a deficient number, since it is larger than the sum of its proper divisors (221622585619).

664841565741 is a wasteful number, since it uses less digits than its factorization.

664841565741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182595.

The product of its digits is 19353600, while the sum is 57.

The spelling of 664841565741 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred sixty-five thousand, seven hundred forty-one".