664436133374105 has 8 divisors (see below), whose sum is σ = 798501090274632. Its totient is φ = 530763753215488.

The previous prime is 664436133374051. The next prime is 664436133374129. The reversal of 664436133374105 is 501473331634466.

It can be written as a sum of positive squares in 4 ways, for example, as 423879414542224 + 240556718831881 = 20588332^2 + 15509891^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 664436133374105 - 2¹⁶ = 664436133308569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98144181752 + ... + 98144188521.

It is an arithmetic number, because the mean of its divisors is an integer number (99812636284329).

Almost surely, 2^{664436133374105} is an apocalyptic number.

It is an amenable number.

664436133374105 is a deficient number, since it is larger than the sum of its proper divisors (134064956900527).

664436133374105 is a wasteful number, since it uses less digits than its factorization.

664436133374105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196288370955.

The product of its (nonzero) digits is 39191040, while the sum is 56.

The spelling of 664436133374105 in words is "six hundred sixty-four trillion, four hundred thirty-six billion, one hundred thirty-three million, three hundred seventy-four thousand, one hundred five".