664581416335 has 4 divisors (see below), whose sum is σ = 797497699608. Its totient is φ = 531665133064.

The previous prime is 664581416333. The next prime is 664581416351. The reversal of 664581416335 is 533614185466.

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 664581416335 - 2¹ = 664581416333 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 (664581416333) 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, 66458141629 + ... + 66458141638.

It is an arithmetic number, because the mean of its divisors is an integer number (199374424902).

Almost surely, 2^664581416335 is an apocalyptic number.

664581416335 is a deficient number, since it is larger than the sum of its proper divisors (132916283273).

664581416335 is a wasteful number, since it uses less digits than its factorization.

664581416335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132916283272.

The product of its digits is 6220800, while the sum is 52.

The spelling of 664581416335 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred thirty-five".