664662340701201 has 4 divisors (see below), whose sum is σ = 886216454268272. Its totient is φ = 443108227134132.

The previous prime is 664662340701179. The next prime is 664662340701239. The reversal of 664662340701201 is 102107043266466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 664662340701201 - 2³⁰ = 664661266959377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664662340701901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110777056783531 + ... + 110777056783536.

It is an arithmetic number, because the mean of its divisors is an integer number (221554113567068).

Almost surely, 2^{664662340701201} is an apocalyptic number.

It is an amenable number.

664662340701201 is a deficient number, since it is larger than the sum of its proper divisors (221554113567071).

664662340701201 is a wasteful number, since it uses less digits than its factorization.

664662340701201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221554113567070.

The product of its (nonzero) digits is 1741824, while the sum is 48.

Adding to 664662340701201 its reverse (102107043266466), we get a palindrome (766769383967667).

The spelling of 664662340701201 in words is "six hundred sixty-four trillion, six hundred sixty-two billion, three hundred forty million, seven hundred one thousand, two hundred one".