664776414444323 has 4 divisors (see below), whose sum is σ = 665061359330688. Its totient is φ = 664491469557960.

The previous prime is 664776414444299. The next prime is 664776414444341. The reversal of 664776414444323 is 323444414677466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664776414444323 - 2²² = 664776410250019 is a prime.

It is a super-3 number, since 3×664776414444323³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664776414444323.

It is not an unprimeable number, because it can be changed into a prime (664776414440323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142472439683 + ... + 142472444348.

It is an arithmetic number, because the mean of its divisors is an integer number (166265339832672).

Almost surely, 2^{664776414444323} is an apocalyptic number.

664776414444323 is a deficient number, since it is larger than the sum of its proper divisors (284944886365).

664776414444323 is a wasteful number, since it uses less digits than its factorization.

664776414444323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284944886364.

The product of its digits is 780337152, while the sum is 65.

The spelling of 664776414444323 in words is "six hundred sixty-four trillion, seven hundred seventy-six billion, four hundred fourteen million, four hundred forty-four thousand, three hundred twenty-three".